BUZZ-Rolls-Royce: Reverses course after ValueAct ups stake in co
** Rolls-Royce's shares up 1.5 pct, reversing course after weakness earlier in the day, as activist investor ValueAct ups its stake in the British engine maker whose shares have been hammered by a series of profit warnings
** Regulatory filing says ValueAct increases stake in co to more than 10 pct; had bought a 5.44 pct stake in RR in August
** Stock was down about 0.5 pct before announcement
** Volumes in co also jumped, with nearly 60 pct of co's 30-day daily avg vol having gone through
** Co suffered 2nd-worst ever on-the-day share price decline last week (-19.6%) when it issued 4th profit warning in a yr (venkateshasoumithri.mamidipudi.thomsonreuters.com@reuters.net)