什么是ETF

What Is An ETF?

ETF.com
Offering low-cost access to virtually every corner of the market, ETFs allow investors big and small to build institutional-caliber portfolios with lower costs and better transparency than ever before.

But what exactly is an ETF? And how does it provide these benefits?

Want To Know How ETFs Work? First Understand How Mutual Funds Work

To understand how ETFs work, the best place to start is with something familiar, like a traditional mutual fund.

Imagine half a dozen investors, sitting at home, each trying to figure out the best way to invest in the stock market. They could each go out and buy a few stocks on their own, but who has the time or resources to manage a portfolio of 50 or 100 stocks?

Instead, they decide to band together. They pool all of their money and hire a professional investment manager to invest it for them.

To keep track of who invested what, each investor receives “shares,” representing their stake in the total investment.

Because it’s your money, you want to know how much your investment is worth … every day. So every day, the mutual fund tallies up the value of everything it owns and divides it by the number of shares that exist. Whammo-presto: You know exactly what each share is worth.

If you want to buy more shares, you know the amount of cash to send the mutual fund for each share. If you want to sell shares, you know exactly how much cash to expect in return.

It’s an elegant system, and mutual funds have existed for close to 100 years. They currently provide exposure to stocks, bonds, commodities and other assets.