NEW YORK (TheStreet) -- U.S. stock futures were mixed on Black Friday as markets reopened after the Thanksgiving break. Oil stocks were taking a dive as crude prices plunged following OPEC's decision to stick to its production targets.

Widely hoped to limit oil production to address oversupply, OPEC instead agreed to maintain current levels of 30 million barrels a day. West Texas Intermediate crude plummeted 6% to $69.24. Oil prices have dropped 35% since midyear.

Exxon Mobil (XOM) - Get Report tumbled 3.6% in premarket trading, Chevron (CVX) - Get Report fell 4% and BP (BP) - Get Report dropped 5.2%.

Airline stocks were gaining ground as investors predicted the slip in gas prices might benefit the carriers' profitability. Southwest Airlines (LUV) - Get Report added 4.1%, Delta Air Lines (DAL) - Get Report climbed 3.8%, and United Continental (UAL) - Get Report gained 3.5%.

S&P 500 futures were down 0.08% and Dow Jones Industrial Average futures fell 0.02%. Tech-heavy Nasdaq futures were up 0.27%.

The S&P 500 also bagged a record close with trading volumes near 12-month lows as investors clocked out early for the Thanksgiving break.

European markets were all trading lower. The eurozone reported a slip in inflation in November to 0.3% from 0.4%, while unemployment remained high at 11.5%. Germany's DAX fell 0.3% and France's CAC 40 slid 0.25%.

--Written by Keris Alison Lahiff in New York.