The 3rd paragraph of the Big Picture Column today (3/19/2013 edition) says:
The Nasdaq gave up 0.4% and the NYSE composite lost 0.8%. Monday’s action marked the first back-to-back loss for the major indexes since Feb. 20-21. Intraday, the Nasdaq, NYSE composite and the S&P 500
stumbled 1% to 1.2% before bouncing back.
This just remind me of Stock Trader Almanac Book that I read a while back. The book said that in the past 30+ years research they noted that a Down Friday followed by a Down Monday is often an important market inflection point that exhibits a clearly negative bias and frequently coincides with market tops.
Complete Link where I found the articles: