Two similar Vanguard ETFs appear to be great picks right now. Both ETFs should benefit from lower interest rates. Another Vanguard ETF, though, isn't as attractive during periods when rates decline.

The Vanguard Real Estate ETF owns 155 stocks, most of them real estate investment trusts. The Vanguard Small-Cap Value ETF owns 848 stocks with relatively small market caps and attractive valuations.

If you're interested in investing in exchange-traded funds (ETFs), you'll want to put Vanguard's family of funds high on the list to consider. Vanguard is known for its low-cost funds. Over time, the ...