I'm Jessica Edinger, CNBC. Wall Street in the green on this final trading day of July. Tech stocks leading the market rebound this afternoon after Wednesday's plunge.The Dow is the only major average in the green for the month. So far, the Dow's up 189 points, 3/10en of a percent. Amazon shares up 14% leading that Dow higher.Apple is the worst performer in the Dow this afternoon, down 9 and a half%. The S&P 500 index is up 19. The Nasdaq up 80 points this afternoon.Chipmaker shares are mixed. >> Higher toda ...