VTI将是基金市场的老大 VTI is a share class of the world's biggest mutual fund, which holds more than $1 trillion, and is on pace to have more assets than SPY within five years. It could stay on top for decades, based on organic-growth trends, with net flows outpacing SPY's by $100 billion over the past three years.VTI is virtually unchallenged in the total stock-market category. It's also arguably more truly "passive," covering the entire market, not just large caps, and positioned to gain from any regime change to small or value stocks.