The Securities and Exchange Commission approved rule changes proposed by NYSE Arca to allow NYSE Arca to trade certain highly liquid, highly active options classes without designating a Lead Market Maker (LMM) in such options classes. Prior to the rule change, NYSE Arca rules required that an LMM be assigned to every options class. The amended rules provide that a Market Maker may be designated on a rotating basis as the responsible Intermarket Linkage Market Maker to fulfill certain duties that would otherwise be performed by the LMM with respect to the Intermarket Options Linkage (such as routing Principal Acting as Agent Orders to another exchange).$FILE/Microsoft%20Word%20-%20Document%20in%2007-68.pdf