Nasdaq-listed Pyxis Tankers has locked one of its MR product tankers into a two-year charter with CITGO Petroleum at $31,000 per day, securing about $21.8m in net charter revenue. The Greece-based owner has fixed the 2017-built, 50,145 dwt Pyxis Lamda for 24 months, plus or minus 30 days at the charterer’s option. The new employment …