Vietnam index flat at midday; volume to increase soon

HANOI, June 17 (Reuters) - Vietnam's benchmark VN Index was almost flat at Tuesday's break in mixed movements of stocks, with analysts expecting volume to pick up later this week on fund's trading. PetroVietNam Gas, Vietnam's largest listed firm, fell 0.94 percent, while steel producer Hoa Phat Group rose 1.94 percent. Analysts expected volume to increase in coming sessions as the Market Vectors Vietnam exchange-traded fund tends to boost trading in the last days of its second-quarter