Courier services provider Blue Dart Express on Friday posted a drop in profit for the fourth quarter in a row, hurt by increased expenses and muted demand. The company, controlled by Deutsche Post, said consolidated net profit fell nearly 22% to 730.6 million rupees ($8.78 million) in the second quarter. Blue Dart added two Boeing 737 aircraft in fiscal 2023 to cater to tier-II and tier-III cities, a move, analysts said, would improve its margins.