If you want to buy stocks, you may as well do it now, when the prices are low.
may as well
Should (do something), typically because there is no reason not to. The deadline is today, but you may as well send it in anyway—they may still accept it.A: "Are you going to work late tonight?" B: "I may as well. I have nothing else going on."
may/might as well (do something)
used for saying that you will do something because it seems best in the situation that you are in, although you may not really want to do it: Since nobody else wants the job, I might as well give it to him.