According to the Bank for International Settlements,
the preliminary global results from the 2013 Triennial Central Bank
Survey of Foreign Exchange and OTC Derivatives Markets Activity show
that trading in foreign exchange markets averaged $5.3 trillion per day
in April 2013. This is up from $4.0 trillion in April 2010 and $3.3
trillion in April 2007. FX swaps were the most actively traded
instruments in April 2013, at $2.2 trillion per day, followed by spot
trading at $2.0 trillion.