After the decision was made to shut U.S. stock markets, executives of derivatives exchanges including CME Group Inc.

WSJ: Behind Decision to Close Markets

In the past few years, NYSE officials have started telling analysts and investors that the company's primary U.S. competitor is CME Group Inc.

WSJ: CEOs of Nasdaq and NYSE Square Off Over Possible Takeover Battle

It would also supplant CME Group Inc. as the world's largest futures exchange by contract volume and create a clear leader in the U.S. options market.

WSJ: NYSE, Deutsche B?rse in Deal Talks

After markets closed Monday, CME Group Inc.

WSJ: Gold Plummets to Two-Year Low

The contract, which allows participants to lock in prices rather than having to pay the going rate at the time they need apples, started trading on the Minneapolis Grain Exchange Inc. on Aug. 13 and was listed on CME Group Inc.

WSJ: For Investors, a New Pick of the Crop