Reopening the NYSE floor is critical for U.S. stock markets because of the NYSE's role as the primary exchange for many blue-chip listings.

WSJ: Questions Cloud Market Reopening

In the most recent ProShares filing, however, the trust notes that NYSE Arca, a trading venue of NYSE Euronext ( NYX) and the primary exchange for the vast majority of U.S.-listed ETPs, would be the venue of choice.

FORBES: ProShares Considers Listing Products with BATS

One way to get on a Englishman's wick is to offer a piffling 560 pence per share for the London Stock Exchange, the primary stock exchange in the U.K. and the largest in Europe.

FORBES: Magazine Article