CBOE Widens Market Share Lead
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CBOE Widens Market Share Lead

CBOE executed 33.98% of total options volume last month, up from 32.08% in May. The International Securities Exchange executed 26.78% of total order flow, down from 28.17% in May. Overall, the options industry traded 304,003,964 contracts, up 36% over a year ago, according to the Options Industry Council.

CBOE sited several trading volume records set in June in its index options, which the ISE has a limited exposure to. Overall index volumes were up 20% since the previous month and 7% in the last year. The Russell 2000 index option volume soared 226% since last year. ISE’s total volume in index options was up 30.3%, but the exchange traded only 6.9% of total index volume. CBOE’s combined index and ETF market share was 33.7% in June. The ISE combines ETF volume with equity volume, in which it generally holds the top market share in the industry. Equity options volume slightly lagged CBOE’s last month, with 28.46% market share versus CBOE’s 29.56%, according to OIC data.

The Philadelphia Stock Exchange held steady in third place, losing a bit to the fully electronic Nasdaq Options Market and the Boston Options Exchange. Phlx executed 15.36% of all options orders, down from 16.57%

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