A look at the shareholders of Occidental Petroleum Corporation (NYSE:OXY) can tell us which group ... market cap fell to US$46b last week after a 4.6% drop in the share price.

Occidental Petroleum's fundamentals and valuation have improved, presenting a long-term buying opportunity amid oil and gas ...

Occidental Petroleum (OXY) and Magnolia Oil & Gas (MGY) are falling 4% and 3%, respectively ... In the last month, MGY is down 1%, while it has fallen 5% in the last three months.

That number of contracts represents approximately 4.0 million underlying shares, working out to a sizeable 106.1% of EA's average ... Petroleum Corp (Symbol: OXY) saw options trading volume ...

Chevron's diversification, high yield, and long history of success make it a strong buy in the oil space. ConocoPhillips will get an acquisition-fueled boost this year. Occidental Petroleum's efforts ...