Bad loan worries hit stocks — plus, spin-offs, smartphones, and health care

Every weekday, the CNBC Investing Club with Jim Cramer releases the Homestretch — an actionable afternoon update, just in time for the last hour of trading on Wall Street. Markets: The S & P 500 reversed lower Thursday afternoon on concerns about credit stress in the banking industry. The latest issue came up when regional bank Zions revealed plans late Wednesday to write off $50 million to cover two loans. Shares of Zions dropped nearly 12% on Thursday. In sympathy, Capital One , one of the nation's larges ...