Vietnamese stocks may be poised to shake off a lackluster year after securing a bigger-than-expected weighting in FTSE [PERSON_NAME]'s semi-annual index review. The index provider said Friday that 27 Vietnamese stocks will be added to its benchmarks including the emerging-market gauge effective Sept. 21, more than the 23 it indicated in April. The additions will give Vietnamese stocks a weight of 0.49%, according to Vietcap Securities JSC, above FTSE's earlier projection.