The grain markets opened Black Friday's abbreviated trading session mixed, according to private sources.

The Dec. corn futures opened 3/4 of a cent higher at $5.88. The Jan. soybean contract opened 6 1/4 cents lower at $11.16 1/2. The Dec. wheat futures opened 2 1/4 cents higher at $5.81. The Jan. soymeal futures opened $0.80 per short ton higher at $283.70. The Jan. soyoil futures opened $0.38 lower at $48.92.

• Marketing Talk: What's happening on the Floor Friday
  

In the outside markets, the NYMEX crude oil is $0.70 per barrel higher, the dollar is higher and the Dow Jones Industrials are up 97 points.

Light volume and unfavorable outside markets are pressuring the corn, soybean markets Friday. CME Group trading closes at 12:00-Noon CST.