His shares rose 16.24 percent this week in heavy trading.
It had risen almost 5 percent in regular trading to close at $30.
The stock rose 17.9 percent, or $4.25, to $28 in heavy trading yesterday.
The price rose above $50 a barrel in electronic trading after hours.
The shares rose quickly in very heavy trading to reach $43 before settling back to $33 at the end of the day.
Oil prices rose again in light trading, reaching their highest level since December.
Its preferred stock rose 50 cents, to $9.50, also in heavy trading.
Gold rose in domestic trading following a big advance overseas.
The company's stock rose $2.50 a share yesterday, to $62.50, in active trading of 1.9 million shares.
The dollar closed down slightly and gold rose a bit in slow trading.
