Pending review by the U.S. Commodity Futures Trading Commission, trading in Chicago Board of Trade (CBOT) grain and oilseed and Kansas City Board of Trade (KCBT) market hours will be reduced from the current 21 hours for the April 8, 2013 trade date.

According to a CME Group press release, the new hours are:

* Sunday to Friday, electronic trading from 5 p.m. to 5:45 a.m. Pacific Time.

* Monday to Friday, break in electronic trading from 5:45 to 6:30 a.m. Pacific Time.

* Monday to Friday, floor and CME Globex trading from 6:30 to 11:15 a.m. Pacific Time.

The change impacts CBOT wheat, corn, soybeans, soybean meal, soybean oil, rough rice, oats and KCBT wheat futures and options, and all related CBOT and KCBT calendar spread options and inter-commodity spread options.

CME Group first announced it would make the change in January. In making the decision, the derivatives marketplace asked producers, commercial customers, traders and industry participants for feedback, receiving more than 4,000 responses.

The CME Group expanded trading from 17 to 21 hours in May 2012. Critics said the change increased the potential for market volatility and gave an unfair advantage to some with "unequal access" to USDA report data.

"While there were varying opinions about what the modifications to hours should be, we believe these changes balance the needs of our diverse global customers based on their feedback," Tim Adriesen, managing director of agricultural commodities and alternative investments for the CME Group, said in the press release.