The UP World LNG Shipping Index, the world’s only stock index focused on LNG shipping companies, gained 2.18% last week. U.S. stocks represented by the S&P 500 index lost 4.04%. Only one constituent was able to gain a two-digit rise. It was Dynagas LNG Partners (NYSE: DLNG), which gained 21.5%. Exmar NV (BSE: EXM), the …