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Net income rose more than 40% but came in below expectations
Rival Cboe relaxes trading rules in attempt to bolster cryptocurrency business
The volatility measure may have worsened market turmoil and is now under investigation
Cboe says the claims ‘lack credibility’
Exchange group defends flagship volatility index as recriminations fly
JPMorgan, Goldman Sachs cut CBOE rating on concerns of lower Vix futures, options volume
Chairman of CFTC eyes measures to protect futures markets from volatile price swings
Rival hopes to lure lucrative end-of-day business away from NYSE and Nasdaq
More than $80m in bitcoin futures changes hands on CME, giving it edge on rival
CME and Cboe listings have raised concerns among regulators and brokers
Debut of derivatives is a watershed moment for the digital currency
The exchanges are giving customers what they want — tools with which to speculate
Cboe Global Markets forced to halt trading twice on price surge
A bubble, yes, but not a dangerous one until leverage is piled on top
Fund managers wanting to buy and sell large blocks already using waiver rule
Deal promises to redraw the exchange industry landscape in North America
Deal will give Chicago-based group top market share in US options
