In a regulatory filing Tuesday , the U.S. shale driller said it expects to post third-quarter charges of roughly $55.5 million related to the move. Because of the swoon in oil prices, Chesapeake has reduced rig operations and cut capital expenditures after failing to offset the plunge with higher production. Chesapeake, based in Oklahoma City, had about 5,000 employees. On Tuesday, 740 of them were laid off, with about 560 of those positions coming from the home office in Oklahoma, the company said. “As you are fully aware, the current commodity price environment continues to be a challenge for our industry and for Chesapeake,” Chief Executive Doug Lawler wrote in an email to employees. “While this was extremely difficult, we are acting decisively and prudently to enhance the long-term competitiveness and strength of Chesapeake.” Shares of Chesapeake Energy, down 71% over the past year, fell 0.3% to $6.77 in […]