The Bilateral Investment Treaty (BIT) between the governments of the United States and Panama was signed on October 27, 1982. The treaty protects US investment and assists Panama in its efforts to develop its economy by creating conditions more favorable for US private investment and thereby strengthening the development of its private sector. The BIT was the first such treaty signed by the US in the Western Hemisphere. A Panama–United States Trade Promotion Agreement (TPA) was signed in 2007, approved by Panama on July 11, 2007 and by US President Obama on October 21, 2011, and the agreement entered into force on October 31, 2012.