Intraday Return

See: Intraday.

You're a day trader, so you care about what happens between the 9:30 gong and the 4 pm close. You heart caffeine. So you invested in KO when it was at $47.12 after it had opened at $47.23 and sank 11 cents. You waited, thinking that the news items about caffeine actually being good for you would move the stock upward. And yes, those Coca-Cola sponsored research studies always seem to say great things about caffeine and fizzy water as health benefits.

So you closed out your long position in KO at 3:52 pm when it was trading at $47.59, having made about 1% in intraday gains. If you did that every day for a year, you'd more than double your money. So, um, do that.