Because margin calls force investors to sell their shares at times when stock prices are already falling, they can push stocks down quickly and mercilessly. On Friday, Aubrey K. McClendon, the chief executive of Chesapeake Energy, …
Stocks to watch this morning include Halliburton, Chesapeake Energy and more. Halliburton’s fourth-quarter earnings rose 50% on strong growth in North America, as well as lighter growth internationally. The second-largest oilfield service …