A Bullish Statistical Quirk, from Rocky Humbert
Since January, 1967 there have been 90 instances when the NY Stock Exchange "New 52-week Low List" had exactly zero stocks. Although the data are subject to revision, it appears that this happened most recently on March 26th.
This appears to be a fairly bullish omen. After this event, the one month S&P return is:
Mean return: 1.83%
Median return: 2.00%
St Dev: 3.21%
During the entire period since January, 1967 to present, the one month S&P return is:
Mean return: 0.53%
Median return: 0.85%
St Dev: 4.5%