UNITED STATES
                    SECURITIES AND EXCHANGE COMMISSION
                           Washington, D.C. 20549

                                  FORM 10-K

[X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the fiscal year ended  December 31, 2007
                          -----------------------------------------------

                                    or

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the transition period from                    to
                              -------------------    --------------------

Commission file number  333-131607-11
                     -------------------

           HSI Asset Securitization Corporation Trust 2007-OPT1
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          (Exact name of issuing entity as specified in its charter)


                 HSI Asset Securitization Corporation
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          (Exact name of depositor as specified in its charter)


                 HSBC Bank USA, National Association
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          (Exact name of sponsor as specified in its charter)


       Delaware                                   20-2592898
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State or other jurisdiction of                   (I.R.S. Employer
incorporation or organization                   Identification No.)


452 Fifth Avenue, New York, New York                      10018
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(Address of principal executive offices)                       (Zip Code)


Registrant's telephone number, including area code  (212)-525-8119
                                                  -----------------------

Securities registered pursuant to Section 12(b) of the Act:   NONE.



Securities registered pursuant to Section 12(g) of the Act:   NONE.




Indicate by check mark if the registrant is a well-known seasoned issuer,
as defined in Rule 405 of the Securities Act.

                      Yes                       No   X
                          -------                  -------

Indicate by check mark if the registrant is not required to file reports
pursuant to Section 13 or Section 15(d) of the Act.

                      Yes                       No   X
                          -------                  -------

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange
Act of 1934 during the preceding 12 months (or for such shorter period
that the registrant was required to file such reports), and (2) has been
subject to such filing requirements for the past 90 days.

                      Yes   X                   No
                          -------                  -------

Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K (229.405 of this chapter) is not contained herein,
and will not be contained, to the best of registrant's knowledge, in
definitive proxy or information statements incorporated by reference in Part
III of this Form 10-K or any amendment to this Form 10-K.
                                                           -------
Not applicable.


Indicate by check mark whether the registrant is a large accelerated filer,
an accelerated filer, a non-accelerated filer or a smaller reporting company.
See definition of "large accelerated filer", " accelerated filer" and "smaller
reporting company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer      Accelerated filer      Non-accelerated filer X
                       ----                   ----                       ----

Smaller reporting company
                         ----


Indicate by check mark whether the registrant is a shell company (as defined
in Rule 12b-2 of the Act).

                      Yes                       No   X
                          -------                  -------

State the aggregate market value of the voting and non-voting common equity
held by non-affiliates computed by reference to the price at which the
common equity was last sold, or the average bid and asked price of such
common equity, as of the last business day of the registrant's most recently
completed second fiscal quarter.

   Not Applicable


Indicate by check mark whether the registrant has filed all documents and
reports required to be filed by Section 12, 13 or 15(d) of the Securities
Exchange Act of 1934 subsequent to the distribution of securities under a plan
confirmed by a court.

   Not applicable.


Indicate the number of shares outstanding of each of the registrant's classes
of common stock, as of December 31, 2007.

   Not applicable.


                      DOCUMENTS INCORPORATED BY REFERENCE

List hereunder the following documents if incorporated by reference and the
Part of the Form 10-K (e.g., Part I, Part II, etc.) into which the document
is incorporated: (1) Any annual report to security holders; (2) Any proxy or
information statement; and (3) Any prospectus filed pursuant to Rule 424(b)
or (c) under the Securities Act of 1933. The listed documents should be
clearly described for identification purposes (e.g., annual report to
security holders for fiscal year ended December 24, 1980).


   Not applicable.

                                    PART I


Item 1. Business.

Not applicable.


Item 1A. Risk Factors.

Not applicable.


Item 1B. Unresolved Staff Comments.

None.


Item 2. Properties.

Not applicable.


Item 3. Legal Proceedings.

Not applicable.


Item 4. Submission of Matters to a Vote of Security Holders.

Not applicable.


                                    PART II

Item 5. Market for Registrant's Common Equity, Related Stockholder Matters
and Issuer Purchases of Equity Securities.

Not applicable.


Item 6. Selected Financial Data.

Not applicable.


Item 7. Management's Discussion and Analysis of Financial Condition and
Results of Operation.

Not applicable.


Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Not applicable.


Item 8. Financial Statements and Supplementary Data.

Not applicable.


Item 9. Changes in and Disagreements With Accountants on Accounting and
Financial Disclosure.

Not applicable.


Item 9A. Controls and Procedures.

Not applicable.


Item 9A(T). Controls and Procedures.

Not applicable.


Item 9B. Other Information.

None.


                                     PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Not applicable.


Item 11. Executive Compensation.

Not applicable.


Item 12. Security Ownership of Certain Beneficial Owners and Management and
Related Stockholder Matters.

Not applicable.


Item 13. Certain Relationships and Related Transactions, and Director
Independence.

Not applicable.


Item 14. Principal Accounting Fees and Services.

Not applicable.


      ADDITIONAL DISCLOSURE ITEMS PURSUANT TO GENERAL INSTRUCTION J



Item 1112(b) of Regulation AB. Significant Obligor Financial Information

No single obligor represents 10% or more of the pool assets held by the
issuing entity.

Item 1114(b)(2) of Regulation AB. Credit Enhancement and
Other Support, Except for Certain Derivative Instruments (Information
Regarding Significant Enhancement Providers).

No entity or group of affiliated entities provides any external credit
enhancement or other support for the certificates within this transaction
as described under Item 1114 (a) of Regulation AB.


Item 1115(b) of Regulation AB.  Certain Derivative Instruments (Financial
Information).

Wachovia Bank, National Association provides an interest rate swap derivative
instrument for the trust as disclosed in a 424(b)(5) filing dated January 31,
2007, Commission File Number 333-131607-11, CIK Number 0001386630.  No
additional disclosure is necessary because the significance percentage for the
interest rate swap is less than 10% as of December 31, 2007.


Item 1117 of Regulation AB.  Legal Proceedings.

The information regarding this Item has been previously filed in a 424(b)(5)
filing dated January 31, 2007, Commission File Number 333-131607-11, CIK
Number 0001386630.


     Perrie Bonner v. H&R Block Mortgage Corporation; Phillips v. H&R Block
Mortgage Corporation, Option One Mortgage Corporation; and, H&R Block, Inc.
(California); and Wojtzcek v. H&R Block Mortgage Corporation (Wisconsin). On
April 29, 2005, H&R Block Mortgage Corporation ("HRBMC") was named as a
defendant and served with a class action complaint filed by Perrie Bonner, as
plaintiff, in the United States District Court for the Northern District of
Indiana. Hammond Division. The complaint alleges that HRBMC accessed the
plaintiffs consumer report without his consent or for any lawful reason, in
violation of the Fair Credit Reporting Act ("FCRA"). This action is one of
several actions filed earlier against other lenders by the same plaintiff and
his attorneys on a similar basis in the same court. The Wojtzcek and Phillips
actions allege similar violations. HRBMC moved before the Multidistrict
Judicial Panel to seek a transfer of the three complaints, which ordered the
transfer of the three actions to the Northern District of Indiana, Judge Rudy
J. Lozano, for coordinated pretrial proceedings. On August 10, 2007, the
Court granted class certification, certifying three classes: (1) in Bonner,
all persons within the Northern District of Indiana to whom HRBMC sent a
solicitation between April 29, 2003 and May 19, 2005 and who did not obtain
credit in response thereto; (2) in Phillips, all persons in Harris County,
Texas to whom HRBMC sent a solicitation during the longest permissible
statutory period; and (3) in Wojtczak, all persons with a Wisconsin address
to whom HRBMC sent a solicitation since November 20, 2004. HRBMC has been
ordered to provide class lists to plaintiffs' counsel by March 7, 2008;
plaintiffs' counsel then has 30 days within which to mail class notices (at
plaintiffs' counsel's expense) or settle the cases individually.

     Fees, et al. v. Option One Mortgage Corporation (putative class action
filed in August 2001 in the Circuit Court of Cook County, Illinois, on behalf
of borrowers allegedly charged an illegal title indemnity and/or reconveyance
fee as a condition of releasing their mortgages). The class certification
hearing occurred on January 31, 2006, after which the court certified a
nationwide class. Option One Mortgage Corporation's appeal of the
certification was denied by the appellate court on September 14, 2006. Option
One Mortgage Corporation is waiting for plaintiffs' counsel to specify his
classes, which it anticipates will be severely limited, if not eliminated by,
motions to decertify.

     Freitag, et al. v. Option One Mortgage Corporation (putative class
action filed July 29, 2004 in Madison County, Illinois). The complaint seeks
certification of a nationwide class and alleges that Option One Mortgage
Corporation engages in the practice of improperly retaining extra per diem
interest on residential mortgage loans by charging per diem interest up to
and including the date of payoff. Settlement in the amount of $25,000 to the
named plaintiff received court approval on January 1, 2005. Plaintiffs' counsel
filed an amended complaint naming new class representatives on June 10, 2005.
Option One Mortgage Corporation filed a notice of removal to federal court
and a motion to compel arbitration. Plaintiffs have filed a motion to remand.
Plaintiffs agreed to stay further proceedings pending a decision of the
Illinois Supreme Court in the Kinkel case regarding the enforceability of
arbitration agreements that contain class action waivers. Kinkel decision
issued October 5, 2006; held that class action waivers were not per se
unconscionable. Judge Byron held in favor of lender in identical case (Hogle
 v. Wachovia Mortgage Corp.) on April 21, 2006; case currently on appeal. If
upheld on appeal, this case will be dismissed.

     In December. 2007, Option One Mortgage Corporation was served with a
law suit by the National Association for the Advancement of Colored People
(NAACP), which lists twelve other defendants, and alleges discrimination and
fair housing violations. The current analysis of Option One Mortgage
Corporation's legal department is that Option One Mortgage Corporation will
be removed as a defendant in this case

     Schueler, et al v. H&R Block Mortgage Corporation and Option One
Mortgage Corporation. On April 9, 2007, HRMBC and Option One Mortgage
Corporation were named as defendants and served with a class action complaint
filed by Melissa Schueler, et al., as plaintiff, in the United States
District Court for the Central District of California, Southern Division. The
complaint alleges that Option One Mortgage Corporation's affiliate, HRBMC,
failed to pay overtime wages to its loan officers in accordance with the Fair
Labor Standards Act and that such alleged failure constitutes an unfair
business practice under California's Business and Professions Code. Option
One Mortgage Corporation is named as a defendant under the theory that it and
HRBMC operate as a single employer. Option One Mortgage Corporation and
HRBMC's motion to dismiss was denied. On January 24, 2008, the Court issued
an Order granting in part and denying in part plaintiff's Motion for Notice
pursuant to 29 U.S.C. 216(b). On February 13, 2008, Notice to Present and
Former Employees, Consent to Join and Stipulated Proposed Order was submitted
to the Court for approval.

     H&R Block Mortgage received a Civil Investigative Demand from the
Federal Trade Commission on 2/22 2006 regarding voicemail broadcasts. H&R
Block Mortgage has been cooperating with the FTC and producing records in
response to the CID.

     On September 4, 2007, Option One Mortgage Corporation was served with
a class action lawsuit filed in United States District Court for the Northern
District of Illinois, Eastern. Division (Shavers v. Option One Mortgage
Corporation). Option One Mortgage Corporation is the fourth defendant named
in similar suits. The suit alleges discrimination and fair housing violations.
Option One Mortgage Corporation filed its motion to dismiss November 13, 2007
based on Bell Atl. Corp. v Twombly, 127 Supreme Court 55 (2007). The current
analysis of Option One Mortgage Corporation's legal department is that Option
One Mortgage Corporation will be dismissed from this case.

     On November 14, 2007, Option One Mortgage Corporation received a Joint
Subpoena/Investigative Demand from the Ohio Attorney General and the Ohio
Department of Commerce. The Demand indicates an investigation into the
possibility of 1) unfair and deceptive acts and practices in connection with
the servicing and foreclosure of loans; 2) non compliance with the Ohio Second
Mortgage Loan Act; and 3) violation of the state anti-trust statute as it
relates to creation and rating of subprime mortgage investment vehicles.
Option One Mortgage Corporation is cooperating with the Attorney General's
office producing records in response to the CID.

     On March 29. 2007 Option One Mortgage Corporation received notice of a
Civil Investigative Demand ("CID") issued by the Office of the Attorney
General for the Commonwealth of Massachusetts. The CID states that the
Massachusetts Attorney General is seeking certain information as part of a
pending investigation "regarding methods, acts or practices allegedly in
violation of G.L. C. 93A, Section 2(a), in connection with residential
mortgage loans." In addition, On August 29, 2007, Option One Mortgage
Corporation received a follow-up CID that included requests for new documents
as well as expanded information pertaining to documents previously. provided.
Option One Mortgage Corporation has been cooperating with the Attorney
General's Office producing records in response to the CID. On March 4, 2008,
Option One Mortgage Corporation received a letter pursuant to the above named
statute that provided notice of an intent to bring suit against Option One
Mortgage Corporation if the matter could not be resolved.



Item 1119 of Regulation AB.  Affiliation and Certain Relationships and
Related Transactions.

The information regarding this Item has been previously filed in a 424(b)(5)
filing with the Commission on January 31, 2007, Commission File Number 333-
131607-11, CIK Number 0001386630.


Item 1122 of Regulation AB.  Compliance with Applicable Servicing Criteria.

The reports on assessment of compliance with the servicing criteria for asset
-backed securities and the related attestation reports on such assessments of
compliance are attached hereto under Item 15.

Citibank, N.A. has reported material noncompliance with applicable servicing
criterion 1122(d)(2)(i) and 1122(d)(3)(ii) during the year ended December 31,
2007:

1122(d)(2)(i) "With respect to certain transactions for which the transaction
documents require that funds be deposited into the custodial bank accounts on
the day funds are received by the Company, funds were not deposited into the
custodial bank accounts in accordance with the terms of the transaction
documents...the funds received were deposited into the specified custodial
account on the day after the day they were received.  As the one-day delay
only impacted investment income to which the Company was entitled as
compensation for its services as securities administrator, management
believes that the delay did not affect the amount of any payments to any
security holder or to any other transaction party...";

1122(d)(3)(ii) "...With respect to certain remittances during the reporting
period, amounts due to investors were allocated and remitted in accordance
with distribution priority and other terms set forth in the transaction
agreements, but were not paid timely to investors."


Option One Mortgage Corporation has reported material noncompliance with
applicable servicing criterion 1122(d)(4)(iv) during the year ended December
31, 2007:

1122(d)(4)(iv), loan modifications are required to be completed in accordance
with the transaction agreements and related pool asset documents. Managements
notes instances of conflicting language within three PSAs where the verbiage
first indicates to generally modify loans if in the best interest of the
trust, but later qualifies the allowable interest rate reduction.
Non-compliance within this Regulation AB criterion is a result of Management's
incorrect interpretation of the former guidance taking precedence.




Item 1123 of Regulation AB.  Servicer Compliance Statement.

Servicer compliance statements are attached hereto under Item 15.

                                     PART IV

Item 15. Exhibits, Financial Statement Schedules.

  (a) Exhibits
       (4)  Pooling and Servicing agreement dated as of January 1, 2007 among
            HSI Asset Securitization Corporation, as Depositor, CitiMortgage,
            Inc., as Master Servicer, Citibank, N.A., as Securities
            Administrator, Wells Fargo Bank, N.A., as Custodian, OfficeTiger
            Global Real Estate Services Inc., as Credit Risk Manager, Option
            One Mortgage Corporation, as Originator and Servicer and Deutsche
            Bank National Trust Company, as Trustee (incorporated herein by
            reference from Exhibit 4.1 of the Current Report on Form 8-K of
            the registrant, as filed with the Commission on February 9, 2007,
            Commission File Number 333-131607-11, CIK number 0001386630).

      (10)  Incorporated by reference as Exhibit (4).

      (31)  Rule 13a-14(d)/15d-14(d) Certifications.

      (33)  Reports on Assessment of Compliance with Servicing Criteria for
            Asset-Backed Securities.
            (a) Citibank, N.A., as Securities Administrator
            (b) Citimortgage, Inc., as Master Servicer
            (c) Option One Mortgage Corporation, as Servicer
            (d) Wells Fargo Bank, N.A., as Custodian
            (e) FIS Tax Services, as Sub-Contractor for Option One Mortgage
                Corporation
            (f) ZC Sterling Insurance Agency, Inc., as Sub-Contractor for
                Option One Mortgage Corporation
            (g) ZC Real Estate Tax Solutions Limited, as Sub-Contractor for
                Option One Mortgage Corporation

      (34)  Attestation Report on Assessment of Compliance with Servicing
            Criteria for Asset Backed Securities.
            (a) Citibank, N.A., as Securities Administrator
            (b) Citimortgage, Inc., as Master Servicer
            (c) Option One Mortgage Corporation, as Servicer
            (d) Wells Fargo Bank, N.A., as Custodian
            (e) FIS Tax Services, as Sub-Contractor for Option One Mortgage
                Corporation
            (f) ZC Sterling Insurance Agency, Inc., as Sub-Contractor for
                Option One Mortgage Corporation
            (g) ZC Real Estate Tax Solutions Limited, as Sub-Contractor for
                Option One Mortgage Corporation

      (35)  Servicer Compliance Statement.
            (a) Citimortgage, Inc., as Master Servicer
            (b) Option One Mortgage Corporation, as Servicer


  (b) Exhibits identified in paragraph (a) above.

  (c) Not applicable.



                                    SIGNATURES


Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

(Registrant)    HSI Asset Securitization Corporation Trust 2007-OPT1
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Signed:

By /s/ Tommy Harris
      -----------------------------------------------------
       Tommy Harris
       Senior Vice President
       (Senior Officer in Charge of the Servicing Function of the Master
       Servicer)
       CitiMortgage Inc., as Master Servicer



Date   March 28, 2008
      -----------------------------------------------------


Exhibit Index

Exhibit No.

  (a) Exhibits
       (4)  Pooling and Servicing agreement dated as of January 1, 2007 among
            HSI Asset Securitization Corporation, as Depositor, CitiMortgage,
            Inc., as Master Servicer, Citibank, N.A., as Securities
            Administrator, Wells Fargo Bank, N.A., as Custodian, OfficeTiger
            Global Real Estate Services Inc., as Credit Risk Manager, Option
            One Mortgage Corporation, as Originator and Servicer and Deutsche
            Bank National Trust Company, as Trustee (incorporated herein by
            reference from Exhibit 4.1 of the Current Report on Form 8-K of
            the registrant, as filed with the Commission on February 9, 2007,
            Commission File Number 333-131607-11, CIK number 0001386630).

      (10)  Incorporated by reference as Exhibit (4).

      (31)  Rule 13a-14(d)/15d-14(d) Certifications.

      (33)  Reports on Assessment of Compliance with Servicing Criteria for
            Asset-Backed Securities.
            (a) Citibank, N.A., as Securities Administrator
            (b) Citimortgage, Inc., as Master Servicer
            (c) Option One Mortgage Corporation, as Servicer
            (d) Wells Fargo Bank, N.A., as Custodian
            (e) FIS Tax Services, as Sub-Contractor for Option One Mortgage
                Corporation
            (f) ZC Sterling Insurance Agency, Inc., as Sub-Contractor for
                Option One Mortgage Corporation
            (g) ZC Real Estate Tax Solutions Limited, as Sub-Contractor for
                Option One Mortgage Corporation

      (34)  Attestation Report on Assessment of Compliance with Servicing
            Criteria for Asset Backed Securities.
            (a) Citibank, N.A., as Securities Administrator
            (b) Citimortgage, Inc., as Master Servicer
            (c) Option One Mortgage Corporation, as Servicer
            (d) Wells Fargo Bank, N.A., as Custodian
            (e) FIS Tax Services, as Sub-Contractor for Option One Mortgage
                Corporation
            (f) ZC Sterling Insurance Agency, Inc., as Sub-Contractor for
                Option One Mortgage Corporation
            (g) ZC Real Estate Tax Solutions Limited, as Sub-Contractor for
                Option One Mortgage Corporation

      (35)  Servicer Compliance Statement.
            (a) Citimortgage, Inc., as Master Servicer
            (b) Option One Mortgage Corporation, as Servicer

  (b) Exhibits identified in paragraph (a) above.

  (c) Not applicable.






SARBANES-OXLEY CERTIFICATION

I, Tommy Harris, certify that:

            1.  I have reviewed this annual report on Form 10-K, and all
reports on Form 10-D required to be filed in respect of the period covered by
this report on Form 10-K of HSI Asset Securitization Corporation Trust
2007-OPT1 (the "Exchange Act periodic reports");

            2.  Based on my knowledge, the Exchange Act periodic reports,
taken as a whole, do not contain any untrue statement of a material fact or
omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading
with respect to the period covered by this report;

            3.  Based on my knowledge, all of the distribution, servicing and
other information required to be provided under Form 10-D for the period
covered by this report is included in the Exchange Act periodic reports;

            4.  I am responsible for reviewing the activities performed by
the servicer(s) and based on my knowledge and the compliance review(s)
conducted in preparing the servicer compliance statement(s) required in this
report under Item 1123 of Regulation AB, and except as disclosed in the
Exchange Act periodic reports, the servicer(s) have fulfilled their
obligations under the servicing agreement(s), in all material
respects; and

            5.  All of the reports on assessment of compliance with servicing
criteria for asset-backed securities and their related attestation reports on
assessment of compliance with servicing criteria for asset-backed securities
required to be included in this report in accordance with Item 1122 of
Regulation AB and Exchange Act Rules 13a-18 and 15d-18 have been included as
an exhibit to this report, except as otherwise disclosed in this report.  Any
material instances of noncompliance described in such reports have been
disclosed in this report on Form 10-K.

      In giving the certifications above, I have reasonably relied on
information provided to me by the following unaffiliated parties:
Option One Mortgage Corporation, as Servicer; Wells Fargo Bank, N.A., as
Custodian; FIS Tax Services, as Sub-Contractor for Option One Mortgage
Corporation; ZC Sterling Insurance Agency, Inc., as Sub-Contractor for
Option One Mortgage Corporation; and, ZC Real Estate Tax Solutions Limited, as
Sub-Contractor for Option One Mortgage Corporation.



By: /s/ Tommy Harris
   ------------------------
Name:  Tommy Harris
Title: Senior Vice President
(Senior Officer in Charge of the Servicing Function of the Master Servicer)

Date:     March 28, 2008