Despite market jitters returning to send the Dow tumbling nearly 3 percent Tuesday, Fundstrat founder Tom Lee told CNBC he was preparing for a big upside swing.

"I think some things are underway now that are going to provide us the capability to make a pretty big move and therefore if you think a few months out this is going to prove to be a very good opportunity," Lee said during an interview with CNBC's "Power Lunch."