Since February began, DHT’s stock has roughly maintained its gain. DHT operates a fleet of 20 crude-oil tankers out of its headquarters in Bermuda.The prices it can charge for chartering these vessels are broadly defined by the trend line on the Baltic Dirty Tanker Index ,which tracks average industry rates for chartering “dirty” tankers transporting crude oil .And because revenue and profit tend to flow from those charter rates, the price of oil-shipping stocks can usually be expected to track the trend on the BDTI.