A price$-$weighted index consists of three stocks: Stock A $(10$ million shares, $$41$ per share$),$ Stock B $(65$ million shares, $$50$ per share$),$ and Stock C $(10$ million shares, $$39$ per share$).$ Tomorrow, Stock A is worth $$37$ per share, Stock B is worth $$58$ per share, and Stock C is worth $$29$ per share. What is the return on the stock index? Go out three decimals $-$ for example, write $8\mathrm{.}135$ or $-3\mathrm{.}851.$

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