EFTA Document EFTA01393144

options, restricting the types of orders that may be employed, and modifying or eliminating the bidiasked differential at which market-makers or specialists may quote. The taking of such actions by an options mar- ket often is promptly disclosed to the trading crowd in that options market, to representatives of brokerage firms that are members of the options market, and/or to price vendors, but the actions may be taken without public notice, and there can be no assurance that dis- closure