Apple’s Upbeat Forecast Clouded by Fears About Rising Costs

Apple Inc. delivered record quarterly sales and a better-than-anticipated forecast for the current period, even as the company warned that rising component costs are threatening to squeeze margins.

Revenue will rise 13% to 16% in the second quarter, which runs through March, the company said Thursday during a conference call with analysts. That exceeded the 10% projected by Wall Street — showing that Apple can maintain momentum after an iPhone-fueled sales surge in the December quarter.