Days after International Securities Exchange (ISE) went to court in a legal maneuver to offer S&P and Dow Jones index options, those companies along with Chicago Board Options Exchange (CBOE) filed a suit against ISE.
The lawsuit, filed by CBOE, Dow Jones and S&P parent company McGraw Hill on 15 November, sought a court ruling that would prohibit ISE from listing SPX options or DJX options, because of CBOE's exclusive license rights to those contracts. Options Clearing Corporation, which clears all equity options in the US, has also...