If you have $500 to invest and are already exposed to the broader market via an S&P 500 exchange-traded fund ( ETF ), now could be a good time to lean on more of the value stocks within the index by investing in the Vanguard S&P 500 Value ETF ( VOOV -0.97%).

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.

Vanguard Group's Standard & Poor's 500 ETF is on the edge of finally seizing the title of the world's largest exchange-traded fund from rival State Street Global Advisors' product, the SPDR S&P 500 Trust ,

When it comes to investing in exchange-traded funds (ETFs), investors have many choices. You can follow the latest artificial intelligence companies with an AI ETF, or even dip your toe into cryptocurrencies with a Bitcoin ETF.

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).

Retail investors are getting into the idea of passive investing and we’ve seen a steady increase in the funds poured into ETFs. A top choice for investors, Vanguard has set a gold standard for low-cost funds that are ideal for long-term investors.

Indexes have been soaring in recent quarters, led by growth stocks as investors pile into themes like artificial intelligence and quantum computing. And optimism about an improving economic environment -- with lower interest rates -- ahead also has fueled gains.