Difference Between SPY and QQQ

[adamalpha]

What is the difference between SPY and QQQ? Now I know they are different ETF's, I want to understand why would I trade one versus the other if I wanted to focus on one of them.

Both seem like popular choices for traders. Any disadvantage to trading SPY? how about QQQ?

[Kraig]

SPY has excellent liquidity, as a matter of fact it is the poster child for liquidity

[grayson]

The Invesco QQQ is a an ETC that is passively managed, it tracks the Nasdaq100 so it is mainly tech powerhouses. The SPY is correlated to track the entire S&P

[PlaceboTrader]

SPY can be traded and so can QQQ. Get to know the ETF you're trading, the familiarity is critical

[joker]

SPY has unmatched liquidity. It makes order fills instantaneous so I would recommend "The SPY"

[mariobros]

SPY has extreme volume which makes for great order fills.

[Kraig]

That's what I said... SPY has super-liquidity!