
U.S. stocks closed flat in sluggish trading ahead of Fed Chairman Ben Bernanke's speech later this week.
Dow Jones Industrial Average fell 21.68 points, or 0.17 per cent at 13,102.99, led by HP shares which finished at multi-year low.
HP shares plunged over 30 per cent year-to-date and is the worst performer on the blue-chip index.
S&P 500 dropped 1.14 points, or 0.08 per cent to 1,409.30.
Among the key S&P sectors, telecoms led the laggards, while energy managed a slight gain.
Nasdaq composite gained 3.95 points, or 0.13 per cent at 3,077.14.