Shares of some top oil companies are up at 10 a.m.:
Chevron rose $2.62 or 3.4 percent, to $79.72.
ConocoPhillips rose $1.92 or 3.5 percent, to $56.60.
Exxon Mobil rose $1.51 or 2.4 percent, to $65.21.
Marathon Oil rose $.96 or 3.2 percent, to $31.40.