Wall Street is heading into the busiest earnings week of the season, and JPMorgan said to expect higher-than-usual volatility in the wake of results. Almost half of the Russell 1000 , an index that tracks the largest US companies and encompasses roughly  93%  of the American equity market, will report earnings this week. JPMorgan found that the options market is pricing in above-average volatility due to uncertainty and an embedded geopolitical risk premium, meaning investors could be in for a