Acquisition of Treasuries trading platform moves exchange operator into new asset class.

Futures exchange bids $33.12 a share; deal expected to close late next year.

Weather-related shutdown suggests markets infrastructure still too concentrated in New York area.

Weather-related shutdown suggests markets infrastructure still too concentrated in New York area.

Shutdown ahead of storm may extend through Tuesday.

After problems in initial trading of Facebook shares, exchange cites poor design.

After problems in initial trading of Facebook shares, exchange cites poor design.

Decision would confirm exchange's role as venue for biggest tech companies.