Stock Market Week Ahead: A Choppy Market Heads For Nvidia Earnings, Jackson Hole

Friday ended with both the Nasdaq and the S&P 500 posted their first weekly decline in four weeks. Each kept their year-to-date gains above 12%. And both indexes also undercut the low of their Aug. 4 follow through days. A key difference is that, in addition, the Nasdaq ended Friday's session below its 21-day exponential moving average, while the S&P…