state street bank issuances : state street bank currently has authority to issue up to an aggregate of $ 1 billion of subordinated fixed-rate , floating-rate or zero-coupon bank notes with a maturity of five to fifteen years . with respect to the 5.25% ( 5.25 % ) subordinated bank notes due 2018 , state street bank is required to make semi-annual interest payments on the outstanding principal balance of the notes on april 15 and october 15 of each year , and the notes qualify as tier 2 capital under regulatory capital guidelines . with respect to the 5.30% ( 5.30 % ) subordinated notes due 2016 and the floating-rate subordinated notes due 2015 , state street bank is required to make semi-annual interest payments on the outstanding principal balance of the 5.30% ( 5.30 % ) notes on january 15 and july 15 of each year beginning in july 2006 , and quarterly interest payments on the outstanding principal balance of the floating-rate notes on march 8 , june 8 , september 8 and december 8 of each year beginning in march 2006 . the notes qualify as tier 2 capital under regulatory capital guidelines . note 10 . commitments and contingencies off-balance sheet commitments and contingencies : credit-related financial instruments include indemnified securities financing , unfunded commitments to extend credit or purchase assets and standby letters of credit . the total potential loss on unfunded commitments , standby and commercial letters of credit and securities finance indemnifications is equal to the total contractual amount , which does not consider the value of any collateral . the following is a summary of the contractual amount of credit-related , off-balance sheet financial instruments at december 31 . amounts reported do not reflect participations to unrelated third parties. .

2006: indemnified securities financing: 506032
liquidity asset purchase agreements: 30251
unfunded commitments to extend credit: 16354
standby letters of credit: 4926
2005: indemnified securities financing: 372863
liquidity asset purchase agreements: 24412
unfunded commitments to extend credit: 14403
standby letters of credit: 5027

on behalf of our customers , we lend their securities to creditworthy brokers and other institutions . in certain circumstances , we may indemnify our customers for the fair market value of those securities against a failure of the borrower to return such securities . collateral funds received in connection with our securities finance services are held by us as agent and are not recorded in our consolidated statement of condition . we require the borrowers to provide collateral in an amount equal to or in excess of 100% ( 100 % ) of the fair market value of the securities borrowed . the borrowed securities are revalued daily to determine if additional collateral is necessary . we held , as agent , cash and u.s . government securities totaling $ 527.37 billion and $ 387.22 billion as collateral for indemnified securities on loan at december 31 , 2006 and 2005 , respectively . approximately 81% ( 81 % ) of the unfunded commitments to extend credit and liquidity asset purchase agreements expire within one year from the date of issue . since many of the commitments are expected to expire or renew without being drawn upon , the total commitment amounts do not necessarily represent future cash requirements . in the normal course of business , we provide liquidity and credit enhancements to asset-backed commercial paper programs , or 201cconduits . 201d these conduits are more fully described in note 11 . the commercial paper issuances and commitments of the conduits to provide funding are supported by liquidity asset purchase agreements and backup liquidity lines of credit , the majority of which are provided by us . in addition , we provide direct credit support to the conduits in the form of standby letters of credit . our commitments under liquidity asset purchase agreements and backup lines of credit totaled $ 23.99 billion at december 31 , 2006 , and are included in the preceding table . our commitments under seq 83 copyarea : 38 . x 54 . trimsize : 8.25 x 10.75 typeset state street corporation serverprocess c:\\fc\\delivery_1024177\\2771-1-dm_p.pdf chksum : 0 cycle 1merrill corporation 07-2771-1 thu mar 01 17:10:46 2007 ( v 2.247w--stp1pae18 ) .

Questions:
what is the net change in the balance of indemnified securities financing from 2005 to 2006?
what is the balance of indemnified securities financing in 2005?
what percentage change does this represent?

Answers:
133169
372863
35.7%