NEW YORK (TheStreet) -- With central banks across the world remaining committed to accommodative policies, expect trendless and choppy currency markets to persist into 2014.Last week, Janet Yellen, the nominee to head the Federal Reserve, told the Senate Banking Committee that stimulus is still needed to fuel the economy. The market saw that as bearish for the U.S. dollar, which was sold against other currencies. Central banks from Europe to Japan have made similar commitments to stimulus, which should make for volatile trading among currency pairs. FXE). The euro/dollar cross shows how two loose policy currencies can trade in volatile ranges. After the financial crisis of 2008, both central banks eventually tried to help the economy by dropping rates and purchasing bonds. The question was no longer which bank would raise rates first, but rather which economy was relatively stronger.