As if you didn't already feel it... Per S&P tech analysis. In 2008, 53% of the days have moved at least 1% with many having strong intraday reversals. Average intraday high to low for 2008 is 2.2% Analyst earnings estimates are at a wider level than many years, which should add to, or at least maintain the volatilty this earnings season. I can't remember the rest, but bottom line, the way they measure volatility is at a 70 year high.