SPLV offers a straightforward low-volatility take on the S&P 500. It selects about 100 S&P 500 stocks with the lowest daily volatility over the past year. Least volatile stocks receive the highest weight in the portfolio. SPLV does not consider correlation among stocks, so it produces a basket of low-volatility stocks, not a minimum volatility portfolio, in contrast with iShares' USMV. The largely unconstrained fund makes sizable sector bets at times, which can change dramatically over successive quarterly rebalances. Volatility-based selection and weighting typically drive SPLV's market-cap and beta lower than its neutral benchmark.