A Yahoo Finance article analysis suggests that the Vanguard Morningstar Total Stock Market ETF (VTI) is a safer investment choice than the Vanguard S&P 500 ETF (VOO) during a bear market. The article argues that VOO primarily tracks the 500 largest U.S. companies in the S&P 500 index, while VTI covers nearly all stocks traded in the U.S. market, including approximately 5.9% in small-cap and mid-cap stocks. VTI's diversified allocation helps reduce concentration risk and offers unique growth opportunities during market recoveries after a bear market, as small-cap and mid-cap stocks often perform well during market rebounds.