U.S. stock exchange field heats up as MEMX gets SEC nod

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NASDAQ OMX Group (NASDAQ: NDAQ) Delayed: 91.22 -0.79 (0.86%)
Previous Close $92.01    52 Week High $71.92 
Open $92.43    52 Week Low $54.62 
Day High $92.66    P/E 40.54 
Day Low $90.29    EPS $2.25 
Volume 1,227,156