Net inflows of capital into U.S. assets in March fell more than expected to $45.7 billion, short of the amount needed to cover the U.S. trade deficit of $55.0 billion in the month, a government report showed on Monday. It was the lowest since net inflows of $26.5 billion in October 2003, the Treasury Department said. Net inflows of capital narrowed from a revised $84.1 billion in February, which was originally reported as $84.5 billion, according to the Treasury International Capital Data report. Analysts were expecting inflows of between $65 billion and $75 billion. Financial markets watch the report as a measure of foreigners' appetite for U.S. assets.