NASD,Total,100.00%,47.57%,31.32%,21.11%
NASD,Principal,73.61%,72.76%,66.22%,86.51%
NASD,UBS Securities,19.62%,22.62%,19.96%,12.34%
NYSE,Total,100.00%,66.40%,13.44%,20.16%
NYSE,Principal,79.39%,79.40%,65.51%,88.60%
NYSE,UBS Securities,17.15%,18.06%,23.42%,9.95%
AMEX,Total,100.00%,55.80%,27.31%,16.89%
AMEX,Principal,64.03%,64.46%,48.62%,87.56%
AMEX,UBS Securities,32.44%,32.83%,44.92%,10.95%
OPTN,Total,100.00%,19.92%,80.06%,0.02%
OPTN,ARCA,33.07%,6.26%,39.75%,0.00%
OPTN,CBOE,17.24%,25.46%,15.19%,0.00%
OPTN,AMEX,15.22%,29.87%,11.55%,100.00%
OPTN,PHLX,8.78%,5.73%,9.54%,0.00%
OPTN,BATS,8.65%,3.61%,9.91%,0.00%
OPTN,BOX,5.42%,19.21%,2.00%,0.00%
OPTN,NSDQ,5.20%,0.88%,6.27%,0.00%
OPTN,ISE,3.83%,7.84%,2.83%,0.00%
OPTN,C2OX,2.51%,1.06%,2.87%,0.00%
OPTN,NFSC,0.09%,0.09%,0.09%,0.00%