Tom Lee, co-founder and head of research at Fundstrat, expects some turbulence in the stock market over the next eight weeks, although he expects a pullback could be a buying opportunity for investors. "There's the Fed's September policy meeting and the U.S. election, and these things are going to make people nervous," Lee said in an interview with CNBC's "SquawkBox Europe" on Tuesday. "I think investors should be cautious over the next eight weeks." However, he continued, "I think there are opportunities for people to buy in the next eight weeks. That is, it's good to be cautious, but also be prepared to buy on dips." According to CME's "Fed Watch" tool, the market is pricing in a 67% chance of a 25 basis point rate cut by the Fed in September, while others see an opportunity for a 50 basis point cut. (Jinshi)