Latest Margin Debt Figures Send An Ominous Signal For Stocks

 | Oct 20, 2015 04:45AM ET

The NYSE margin debt numbers for the month of September were released yesterday, revealing a very significant milestone for the stock market. As of the end of September, both stocks and margin debt have seen their 12-month rate of change turn negative.

The last time this happened was April of 2008, as the stock market crash during the financial crisis was just getting started. The time before that was December 2000, the very beginning of the dotcom bust.