Nvidia (NVDA) got bullish momentum from Wells Fargo and Morgan Stanley ahead of next week's earnings. Diane King Hall talks about what analysts expect from Nvidia's long-term prospects. StubHub (STUB) sunk more than 27% following its worse-than-expected earnings and lack of guidance. Diane later eyes mergers and acquisitions as Merck (MRK) seeks to buy Cidara Therapeutics (CDTX) for $9.2 billion.