Analyst downgrades top S&P 500 stock after disappointing earnings [https://www.thestreet.com/.image/t_share/MTk4NTA5NTkxMTQxNjIzMjM1/coinbase.jpg] Analyst downgrades top S&P 500 stock after disappointing earnings Compass Point downgraded Coinbase's rating from "Neutral" to "Sell." [https://www.thestreet.com/crypto/markets/top-analyst-downgrades-s-p-500-stock-after-disappointing-earnings]