India, Aug. 17 -- Boeing shares edged lower before the US stock market opened on Monday, August 17, as investors weighed the strength of the company's Apache helicopter backlog against continued pressure on defense-sector profitability. Boeing Co. shares were indicated around $231.23, down roughly 0.2% from Friday's close of $231.67, according to the figures provided. The latest investor focus comes after Boeing's second-quarter results showed a sharp increase in defense revenue but an operating loss in its Defense, Space & Security business. Boeing reported that the segment generated $7.483 billion in second-quarter revenue, up 13% from a year earlier, while its operating result was a $15 million loss. The combination leaves Boeing inves...