Morningstar analyst Michael Rawson, though, warns that VOO “has slightly higher market-impact costs because of lower trading volumes.”

SPY has a bid-ask spread of 0.01%, and shows an average 128.9 million daily average  volume, according to Morningstar data. IVV has a 0.01% bid-ask spread and a 4.2 million daily average volume. VOO has a 0.03% bid-ask spread and a 1.5 million daily average volume.

For more information on the S&P 500, visit our S&P 500 category.

Max Chen contributed to this article.

Full disclosure: Tom Lydon’s clients own SPY.