As market-capitalization-weighted index ETFs, both VOO and VTI naturally feature a high allocation to large-cap stocks. If you want to focus more on mid- and small-cap stocks, a dedicated non-core ETF like VXF might be ideal. This ETF tracks the S&P Completion Index for a 0.06% expense ratio.

In this piece, we’ll check in on some of the more underrated exchange-traded fund (ETF) products that may be worth looking into as the great bull market runs for another year. Undoubtedly, it can pay dividends to go beyond index funds,

If you're looking for a simple way to generate wealth in the stock market with little effort, you can't go wrong with an exchange-traded fund (ETF). ETFs trade like stocks, meaning you can buy individual shares.

Leadership from the top The Vanguard Mega Cap Growth ETF has just 71 holdings compared to 504 in the Vanguard S&P 500 ETF (NYSEMKT: VOO), which mirrors the performance of the S&P 500. A greater concentration in the largest growth stocks by market cap results in far higher weightings in Magnificent Seven stocks.

Its smart to seek income from your investments -- whether it's because you need that income to support yourself in retirement, or whether you want to use it to invest in more stocks. It's also a fine idea to seek that passive income from exchange-traded funds (ETFs) that are focused on dividend-paying shares.