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Dow Jones News Today: Stocks Up Ahead of Obamacare Repeal Vote, Janet Yellen Speech

The Dow Jones news today features stocks rising in premarket hours as investors prepare for what could be a volatile day in the markets.

A loss today by Republicans would also empower President Donald Trump's critics and help them align against other policy priorities in the year ahead.

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