VOO is a buy as a low-cost, broadly diversified S&P 500 core holding: inexpensive, tax-efficient, and offering exposure to major US companies. Overlap with other funds is not necessarily bad if the non-overlapping parts are important; add international, small-cap value or bond funds for diversification.

Just buy a VOO box. Just buy the S&P 500 index.

Let's assume you own VOO shares. It is one of the most popular S&P 500 exchange-traded funds , and for good reason . It is inexpensive, widely diversified across major US companies, and gives you the opportunity to invest in the world's most powerful companies.

At the same time, a broad-based equity fund such as a VOO tends to be relatively tax-efficient due to its low stock turnover rate and fund structure.

I have five different exchange-traded funds (ETFs). They are: VOO, QQQM, VGT, SCHG, and SPMO. The VOO fund tracks the S&P 500 index.

However, even owning two of those funds, such as VOO and QQQM or others, just because it indicates significant overlap, does not necessarily mean it is a bad thing, especially if the non-overlapping parts are important enough to keep in the portfolio.

For example, if you already own VOO and want additional diversification, you could consider adding something like VXUS for international exposure or AVUV for exposure to small-cap value stocks, or an investment bond fund if you are looking to reduce overall portfolio volatility.

For example, VOO and IVV have historically charged around 0.03% per annum.

Should I buy VOO or VTI? QQQM or SCHG?