Stocks Mixed as Oil Gets Lift From OPEC; FitBit to Acquire Pebble

U.S. stocks were mixed Thursday on the first trading session of December after the markets rallied throughout November. Oil prices continued to benefit from Wednesday's landmark OPEC deal with prices for West Texas Intermediate nearing $51 a barrel. OPEC agreed to reduce oil production by 1.2 million barrels a day starting in January - it's first production cut since 2008. Saudi Arabia bearing the biggest brunt of the cuts to the tune of 486,000 barrels a day. Dollar General (DG) - Get Report reported third quarter earnings of $0.84 a share, missing estimates of $0.93. Revenue rose 5% year over year to $5.32 billion, but fell short of Wall Street's estimates. Analysts say lower prices at Walmart (WMT) - Get Report may have negatively impacted Dollar General's quarter. Fitbit (FIT) - Get Report is set to acquire Pebble Technology, a smartwatch once funded by Kickstarter, for up to $40 million, according to various news reports. Fitbit and Pebble have been facing headwinds. Fitbit's stock is trading 60% below its IPO price, while Pebble cut staff back in March. TheStreet's Scott Gamm reports from Wall Street.