Oracle is the clearest tell. Its five-year credit default swaps, the cost of insuring against the company defaulting, climbed to around 151 basis points in early October, levels last seen in 2009, according to market data cited by Bloomberg. S&P had already cut Oracle's credit rating to BBB-, a single notch above junk, back in July. The company is reportedly targeting more than $40 billion in additional debt and equity this fiscal year. That is on top of the $18 billion in bonds it sold in a single day last September, and the money is needed to keep funding its Texas, Wisconsin and New Mexico sites.