As we head further into December, here's everything you need to know to kick off this week of trading: 

1. CVS Health Corp. (CVS) reached a deal to buy Aetna (AET) for $69 billion. 

2. Disney (DIS) has reportedly restarted discussions to buy some of Twenty-First Century Fox's (FOXA)  media assets.  

3. Venezuela's president announced the country is launching a cryptocurrency called "the Petro."

4. Investors expect earnings from Bob Evans (BOBE) and Ascena (ASNA) .  

5. The Dow could jump 200 points at the open as investors react to the weekend's tax reform news.

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