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How Today's Earnings Reports Will Lift the Dow Jones Industrial Average

The Dow Jones Industrial Average is trending up this morning thanks to highly anticipated earnings reports from Wal-Mart Stores (NYSE: WMT), which is up 3.3% already today.

Dow Jones futures today are up 68 points ahead of trading, but a Republican defector from the Senate's tax cut bill could threaten gains.

Here's a look at today's most important market events and stocks, plus a look at today's economic calendar...