They are easy to trade: they can be bought and sold anytime through any broker, just like a stock.They are tax efficient: ETFs typically have lower portfolio turnover and strive to minimize capital gains distributions so that investors are only taxed when they initiate a trade. Note: There are special rules for currency, commodity, and metals ETFs that cause them to be taxed in the same way as the underlying class of investment (see Q 7959 to Q 7962).
Greater Transparency: ETFs disclose the exact holdings of their funds on a daily basis so the investor always understands precisely what he or she owns.
Flexibility: Any action that an investor can take with respect to stock can be accomplished with an ETF. This includes shorting and holding ETFs in margin accounts and placing limit orders.