There are 2 big catalysts that could spark a stock market rally this week, according to Fundstrat Cindy Ord/Getty Images Investors should expect a stock market rally this week amid two big catalysts, according to Fundstrat's Tom Lee. Lee expects solid earnings from Nvidia and dovish comments from Fed Chair Jerome Powell at Jackson Hole. "I think the Fed might be worried something's going to break" amid a renewed surge in interest rates, Lee said. The stock market's 5% sell-off in August is likely to find its bottom this week and stage a rally amid two big market-moving catalysts, according…