Financial report context:
the fair value of our total investments increased $ 4.8 billion during 2010 , primarily due to unrealized appreciation , the inves- ting of operating cash flows , and the portfolios acquired in the 2010 corporate acquisitions . the following tables show the market value of our fixed maturities and short-term investments at december 31 , 2010 and 2009 . the first table lists investments according to type and the second according to s&p credit rating. .

Financial table:
( in millions of u.s . dollars except for percentages ): treasury; 2010 market value: $ 2075; 2010 percentage of total: 4% ( 4 % ); 2010 market value: $ 2068; percentageof total: 5% ( 5 % )
( in millions of u.s . dollars except for percentages ): agency; 2010 market value: 2015; 2010 percentage of total: 4% ( 4 % ); 2010 market value: 2698; percentageof total: 6% ( 6 % )
( in millions of u.s . dollars except for percentages ): corporate and asset-backed securities; 2010 market value: 15900; 2010 percentage of total: 33% ( 33 % ); 2010 market value: 13537; percentageof total: 30% ( 30 % )
( in millions of u.s . dollars except for percentages ): mortgage-backed securities; 2010 market value: 12362; 2010 percentage of total: 25% ( 25 % ); 2010 market value: 11311; percentageof total: 25% ( 25 % )
( in millions of u.s . dollars except for percentages ): municipal; 2010 market value: 2449; 2010 percentage of total: 5% ( 5 % ); 2010 market value: 2300; percentageof total: 5% ( 5 % )
( in millions of u.s . dollars except for percentages ): non-u.s .; 2010 market value: 12199; 2010 percentage of total: 25% ( 25 % ); 2010 market value: 11172; percentageof total: 25% ( 25 % )
( in millions of u.s . dollars except for percentages ): short-term investments; 2010 market value: 1983; 2010 percentage of total: 4% ( 4 % ); 2010 market value: 1667; percentageof total: 4% ( 4 % )
( in millions of u.s . dollars except for percentages ): total; 2010 market value: $ 48983; 2010 percentage of total: 100% ( 100 % ); 2010 market value: $ 44753; percentageof total: 100% ( 100 % )
( in millions of u.s . dollars except for percentages ): aaa; 2010 market value: $ 23718; 2010 percentage of total: 48% ( 48 % ); 2010 market value: $ 22884; percentageof total: 51% ( 51 % )
( in millions of u.s . dollars except for percentages ): aa; 2010 market value: 4714; 2010 percentage of total: 10% ( 10 % ); 2010 market value: 4021; percentageof total: 9% ( 9 % )
( in millions of u.s . dollars except for percentages ): a; 2010 market value: 8482; 2010 percentage of total: 17% ( 17 % ); 2010 market value: 7461; percentageof total: 17% ( 17 % )
( in millions of u.s . dollars except for percentages ): bbb; 2010 market value: 5487; 2010 percentage of total: 11% ( 11 % ); 2010 market value: 4910; percentageof total: 11% ( 11 % )
( in millions of u.s . dollars except for percentages ): bb; 2010 market value: 3357; 2010 percentage of total: 7% ( 7 % ); 2010 market value: 2866; percentageof total: 6% ( 6 % )
( in millions of u.s . dollars except for percentages ): b; 2010 market value: 2393; 2010 percentage of total: 5% ( 5 % ); 2010 market value: 2029; percentageof total: 5% ( 5 % )
( in millions of u.s . dollars except for percentages ): other; 2010 market value: 832; 2010 percentage of total: 2% ( 2 % ); 2010 market value: 582; percentageof total: 1% ( 1 % )
( in millions of u.s . dollars except for percentages ): total; 2010 market value: $ 48983; 2010 percentage of total: 100% ( 100 % ); 2010 market value: $ 44753; percentageof total: 100% ( 100 % )

Additional report context:
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Question: what is the percentage change in the balance of short-term investments in 2010?
Answer: 19.0%