â¿¿ Loews Corp. sank 5 percent after reporting that its net income plunged 78 percent in the second quarter. The holding company, controlled by New York's Tisch family, took a hit as falling energy prices lowered the value of its oil and gas properties. The company runs Diamond Offshore Drilling Inc., HighMount Exploration & Production and Loews Hotels. Its stock lost $2.16 to $39.54.â¿¿ Suntech Power Holdings plunged 15 percent. The Chinese solar company said it may be the victim of a massive fraud. Suntech dropped 23 cents to $1.34. The solar company's stock has lost 82 percent of its market value over the past year.