HSBC has transacted two US dollar-taka options for Viyellatex, one of the largest garment exporters, and Coats Bangladesh, a leading supplier of yarn and raw materials. The US dollar-taka derivative helps exporters and importers hedge their forex exposures effectively, Tarique I Khan, head of global markets of HSBC, Bangladesh, told reporters at the launch of the product at Dhaka Sheraton Hotel on December 8^th.