The Dow gained another 186 points, to close at 11,433. Good luck searching for explanations (the economic news was not especially good), though it is worth noting that more market newsletter editors have been pessimistic about stocks as of late - and that could actually be a bullish sign. From the LAT:
The Investors Intelligence newsletter survey, which dates back to 1963 and tracks the views of more than 100 letters, historically has been as a good contrarian indicator: Extreme readings of bullishness often herald a market slump; too many bears and it's likely the market is poised to rebound. This week's survey showed that the percentage of editors who are bearish on stocks rose to 40.9%, up from 37.6% the previous week and the most since March 2009 -- exactly when the market was beginning to rebound after the horrendous plunge that began in fall 2008.
Keep in mind that this contrarian indicator can be inexact, and as Tom Petruno points out, the bullish/bearish indicators are a lot clearer after the fact.