The stock market's sudden bout of turbulence has left it without many allies. Bank of America Merrill Lynch said matters have become so dire, that equities are now stuck depending on just a single driver: corporate earnings. Companies in the benchmark S&P 500 have grown profits for seven straight quarters. They are now expected to see full-year expansion of 11 percent. Almost 200 fund managers surveyed by BAML are also their most bullish on earnings since 2011.