Chemical tanker operator Stolt-Nielsen has warned that the sector is “unlikely to improve, at least until the latter half of 2018” due to an oversupply of vessels and soft demand. The company appears to have dealt with this already in 2018 with a focus on specific products and routes. Its U.S.-inbound volumes in the three months to February 28 (the fiscal first quarter for the firm) climbed 43% on a year earlier. That’s been driven by a handful of combinations including refined oil from South Korea (14% of shipments by weight in the past 12 months) and fruit concentrate from Brazil (7...