Stemmed

As several competitors struggled for their very survival last week, Duke Energy reported earnings rose to 57 cents per share in the second quarter from 54 cents a share a year ago, due to hefty profits in the company’s gas pipeline business, which it said offset lower results for its sagging merchant energy business. Wall Street responded favorably to the news, with Duke Energy stock gaining about 27% in value for the week to trade at $22.45 a share late Friday.