Trading buoyed by investors playing the ETF trade – The Market Vectors Vietnam Index on which Van Eck’s Market Vectors Vietnam ETF is benchmarked had its first quarter review last week. We see that the most significant impact will be on STB and BVH. As the index provider announced it would add STB with a weight of 6% and increase BVH’s weight to 8% from 6.71% in the index, effective from March 19th. The announcement could renew investors’ interest on the risky assets. Traders looking to profit o