To amend the Commodity Exchange Act to bring greater transparency and accountability to commodity markets, and for other purposes.

Derivatives Markets Transparency and Accountability Act of 2009 - Amends the Commodity Exchange Act to prohibit the Commodity Futures Trading Commission (CFTC) from permitting a foreign board of trade to provide its U.S-located members with access to the CFTC electronic trading system and order matching system with respect to an agreement, contract, or transaction that settles against any...