The oldest exchange-traded fund listed in the U.S. has just been surpassed in assets under management by a Vanguard ETF that more cheaply tracks the S&P 500 index.

With Vanguard taking the top place among the ETF providers, it is now time to consider two of its ETFs with over 10% upside potential in the next 12 months. These include Vanguard Communication Services ETF (VOX) and Vanguard Dividend Appreciation ETF (VIG).

The Vanguard S&P 500 ETF (VOO) has claimed the top spot for the ETF with the most assets, passing SPDR S&P 500 ETF Trust (SPY). Vanguard Head of Bank and Institutional Janel Jackson says VOO's growth is aided by model portfolios.