Market Vectors Vietnam ETF ( VNM ) Slow growth rate, higher inflation level, trade deficit and bad banking system impacted the Vietnam economy to a great extent in 2011. In order to play the positive trend in the economy, investors can opt for Market Vectors Vietnam ETF (VNM), the lone ETF tracking the economy. VNM started the year on a strong note posting a whopping gain of 18.9% in the first month of the year.