{"pre_text": ["average securities purchased under resale agreements increased to $ 4.69 billion for the year ended december 31 , 2011 from $ 2.96 billion for the year ended december 31 , 2010 .", "average trading account assets increased to $ 2.01 billion for the year ended december 31 , 2011 from $ 376 million for 2010 .", "averages benefited largely from an increase in client demand associated with our trading activities .", "in connection with these activities , we traded in highly liquid fixed-income securities as principal with our custody clients and other third- parties that trade in these securities .", "our average investment securities portfolio increased to $ 103.08 billion for the year ended december 31 , 2011 from $ 96.12 billion for 2010 .", "the increase was generally the result of ongoing purchases of securities , partly offset by maturities and sales .", "in december 2010 , we repositioned our portfolio by selling approximately $ 11 billion of mortgage- and asset-backed securities and re-investing approximately $ 7 billion of the proceeds , primarily in agency mortgage-backed securities .", "the repositioning was undertaken to enhance our regulatory capital ratios under evolving regulatory capital standards , increase our balance sheet flexibility in deploying our capital , and reduce our exposure to certain asset classes .", "during 2011 , we purchased $ 54 billion of highly rated u.s .", "treasury securities , federal agency mortgage-backed securities and u.s .", "and non-u.s .", "asset-backed securities .", "as of december 31 , 2011 , securities rated 201caaa 201d and 201caa 201d comprised approximately 89% ( 89 % ) of our portfolio , compared to 90% ( 90 % ) rated 201caaa 201d and 201caa 201d as of december 31 , 2010 .", "loans and leases averaged $ 12.18 billion for the year ended december 31 , 2011 , compared to $ 12.09 billion for 2010 .", "the increases primarily resulted from higher client demand for short-duration liquidity , offset in part by a decrease in leases and the purchased receivables added in connection with the conduit consolidation , mainly from maturities and pay-downs .", "for 2011 and 2010 , approximately 29% ( 29 % ) and 27% ( 27 % ) , respectively , of our average loan and lease portfolio was composed of short-duration advances that provided liquidity to clients in support of their investment activities related to securities settlement .", "the following table presents average u.s .", "and non-u.s .", "short-duration advances for the years indicated: ."], "post_text": ["for the year ended december 31 , 2011 , the increase in average non-u.s .", "short-duration advances compared to the prior-year period was mainly due to activity associated with clients added in connection with the acquired intesa securities services business .", "average other interest-earning assets increased to $ 5.46 billion for the year ended december 31 , 2011 from $ 1.16 billion for 2010 .", "the increase was primarily the result of higher levels of cash collateral provided in connection with our role as principal in certain securities borrowing activities .", "average interest-bearing deposits increased to $ 88.06 billion for the year ended december 31 , 2011 from $ 76.96 billion for 2010 .", "the increase reflected client deposits added in connection with the may 2010 acquisition of the intesa securities services business , and higher levels of non-u.s .", "transaction accounts associated with new and existing business in assets under custody and administration .", "average other short-term borrowings declined to $ 5.13 billion for the year ended december 31 , 2011 from $ 13.59 billion for 2010 , as the higher levels of client deposits provided additional liquidity .", "average long-term debt increased to $ 8.97 billion for the year ended december 31 , 2011 from $ 8.68 billion for the same period in 2010 .", "the increase primarily reflected the issuance of an aggregate of $ 2 billion of senior notes by us in march 2011 , partly offset by the maturities of $ 1 billion of senior notes in february 2011 and $ 1.45 billion of senior notes in september 2011 , both previously issued by state street bank under the fdic 2019s temporary liquidity guarantee program .", "additional information about our long-term debt is provided in note 9 to the consolidated financial statements included under item 8. ."], "table": [["( in millions )", "years ended december 31 , 2011", "years ended december 31 , 2010", "years ended december 31 , 2009"], ["average u.s . short-duration advances", "$ 1994", "$ 1924", "$ 2213"], ["average non-u.s . short-duration advances", "1585", "1366", "761"], ["total average short-duration advances", "$ 3579", "$ 3290", "$ 2974"]], "table_ori": [["", "Years Ended December 31,"], ["(In millions)", "2011", "2010", "2009"], ["Average U.S. short-duration advances", "$1,994", "$1,924", "$2,213"], ["Average non-U.S. short-duration advances", "1,585", "1,366", "761"], ["Total average short-duration advances", "$3,579", "$3,290", "$2,974"]]}

Question: what is the net change in loans and leases in 2011 , ( in billions ) ?
Evidence:
text_5: the increase was generally the result of ongoing purchases of securities , partly offset by maturities and sales .
text_13: loans and leases averaged $ 12.18 billion for the year ended december 31 , 2011 , compared to $ 12.09 billion for 2010 .
Program: subtract(12.18, 12.09)
Answer:
str_answer: 0.9
exe_answer: 0.09