## College Physics (4th Edition)

Let P be the original stock market index. On Monday, the stock market index is 1.0500 P On Tuesday, the stock market index is $(0.9500)(1.0500)P = 0.9975 ~P$ We can find the percentage change in the stock market. $\frac{(0.9975~P)-(P)}{P}\times 100\% = -0.25\%$ The net percentage change in the stock market index is 0.25%