Electronic exchange captured 70% of IPOs in first six months of year
Acquisition provides lower-cost and more efficient trading environment
Nasdaq Composite Index options begin trading today
Consolidated system capable of trading 6,679 U.S. stocks
Reduced fees effective January 2
Canadian dealers now able to set up U.S.-regulated affiliate
Change aimed at simplifying analysis for investors worldwide
Rules enhance disclosure, transparency
Will also enhance official closing price
Exchange plans to become dominant U.S. market