The yield curve turned negative and is a possible sign of recession. Are there any other signs? Yes, trucking rates are now down year over year. Also consumer confidence is near a 50 year high, which has shown to be a contrary indicator. The probability of a recession has increased.

Market Updates
Sarbanes Oxley: Fewer IPOs and Heavier Fees
Jim Gore explores the decline in publicly listed U.S. companies since Sarbanes-Oxley, IPO market cap trends, and the true cost of private equity fees.

