{"pre_text": ["management 2019s discussion and analysis 144 jpmorgan chase & co./2010 annual report compared with $ 57 million for 2009 .", "decreases in cio and mort- gage banking var for 2010 were again driven by the decline in market volatility and position changes .", "the decline in mortgage banking var at december 31 , 2010 , reflects management 2019s deci- sion to reduce risk given market volatility at the time .", "the firm 2019s average ib and other var diversification benefit was $ 59 million or 37% ( 37 % ) of the sum for 2010 , compared with $ 82 million or 28% ( 28 % ) of the sum for 2009 .", "the firm experienced an increase in the diversification benefit in 2010 as positions changed and correla- tions decreased .", "in general , over the course of the year , var expo- sure can vary significantly as positions change , market volatility fluctuates and diversification benefits change .", "var back-testing the firm conducts daily back-testing of var against its market risk- related revenue , which is defined as the change in value of : princi- pal transactions revenue for ib and cio ( less private equity gains/losses and revenue from longer-term cio investments ) ; trading-related net interest income for ib , cio and mortgage bank- ing ; ib brokerage commissions , underwriting fees or other revenue ; revenue from syndicated lending facilities that the firm intends to distribute ; and mortgage fees and related income for the firm 2019s mortgage pipeline and warehouse loans , msrs , and all related hedges .", "daily firmwide market risk 2013related revenue excludes gains and losses from dva .", "the following histogram illustrates the daily market risk 2013related gains and losses for ib , cio and mortgage banking positions for 2010 .", "the chart shows that the firm posted market risk 2013related gains on 248 out of 261 days in this period , with 12 days exceeding $ 210 million .", "the inset graph looks at those days on which the firm experienced losses and depicts the amount by which the 95% ( 95 % ) confidence-level var ex- ceeded the actual loss on each of those days .", "during 2010 , losses were sustained on 13 days , none of which exceeded the var measure .", "daily ib and other market risk-related gains and losses ( 95% ( 95 % ) confidence-level var ) year ended december 31 , 2010 average daily revenue : $ 87 million $ in millions $ in millions daily ib and other var less market risk-related losses the following table provides information about the gross sensitivity of dva to a one-basis-point increase in jpmorgan chase 2019s credit spreads .", "this sensitivity represents the impact from a one-basis-point parallel shift in jpmorgan chase 2019s entire credit curve .", "as credit curves do not typically move in a parallel fashion , the sensitivity multiplied by the change in spreads at a single maturity point may not be representative of the actual revenue recognized .", "debit valuation adjustment sensitivity 1 basis point increase in december 31 , ( in millions ) jpmorgan chase 2019s credit spread ."], "post_text": ["."], "table": [["december 31 ( in millions )", "1 basis point increase in jpmorgan chase 2019s credit spread"], ["2010", "$ 35"], ["2009", "$ 39"]], "table_ori": [["December 31, (in millions)", "1 Basis point increase in JPMorgan Chase’s credit spread"], ["2010", "$35"], ["2009", "$39"]]}

Question: what was the change in average ib and other var diversification benefit in millions during 2010?
Evidence:
text_3: the firm 2019s average ib and other var diversification benefit was $ 59 million or 37% ( 37 % ) of the sum for 2010 , compared with $ 82 million or 28% ( 28 % ) of the sum for 2009 .
Program: subtract(59, 82)
Answer:
str_answer: -23
exe_answer: -23