US sharemarkets fell on Tuesday as fund managers made portfolio adjustments on the last day of the month and quarter. The Dow Jones index fell by 410 points or 1.8% after trading in a 628 point range. The S&P500 index fell by 1.6% and the Nasdaq lost 74 points or 1.0%. Over the quarter the Dow Jones fell by 23.2% – the largest fall since December quarter 1987 and biggest March quarter decline on record.