News roundup: Shaw buys back more than 6 million shares … State panel to revisit income estimate … U.S. auctions first offshore tracts since 2010 oil spill

Stocking stuffers: The Shaw Group says it has agreed to buy back 6,185,567 shares of its common stock—roughly 8.7% of all its common stock shares—at $24.25 per share, completing a $150 mil…