Trader Brian Jones on Twitter: "You would ONLY buy after hours. 1) If a stock you liked was dropping and was at a good price. 2) If there was a hot stock with strong volume and tight spread. 3) If a small stock came out with Big News." / Twitter

You would ONLY buy after hours. 1) If a stock you liked was dropping and was at a good price. 2) If there was a hot stock with strong volume and tight spread. 3) If a small stock came out with Big News.