PEAK6, OptionsHouse's parent, will sell the broker to General Atlantic, which will simultaneously acquire a majority stake in tradeMonster. The merger, expected to be finalized in the third WSJ WSJ LIVE WSJ Live on Facebook.

MORE Mansion Global WSJ Secure BigCharts Financial News Professor Journal Realtor. Home Magazine This Week's Edition Past Editions New: June 7, 1: Get The Full Story.

Citibank Review: $$ Checking/Savings Promotions!

Want to participate in the discussion? Log in for complete access.

OptionsHouse and tradeMONSTER to Combine to Form Leading Online Brokerage Firm

Latest Market Videos 1 Why Venmo Should Feel Threatened 2 Why Grubhub Could Be Amazon's Next Takeout Target 3 Chicago Fed President Discusses Timing of Rate Increases. Customer Service Customer Center Contact Us Live Help Refer Your Friends to Barron's and Get Rewarded.

Learn More Create an Account Subscribe to Barron's Magazine Subscribers: Activate Your Digital Access About Barrons.