[coyled]

As a point of comparison, NASDAQ handled trades for 750 million shares in 1.1 seconds for last year's Russell Reconstitution[1], one of the busiest equity trading days of the year.

[1] -- http://en.wikipedia.org/wiki/Russell_Indexes#Annual_reconsti...

[cma]

Trading systems are trivially shardable by symbol or letter range; not so much help for a single symbol as in the case of an IPO.