Russell Investments' Doug Gordon is optimistic stocks will find a floor — just not until next year.
Gordon, a senior portfolio manager on the firm's technical asset allocation strategies team, blames uncertainty surrounding the U.S.-China trade war and Federal Reserve policy for the violent market swings.
"The first and fundamental question: Is this a correction or is this the start of the bear market? While you can certainly see a path that could get us to a bear market, I think it's more of a messy correction," he told CNBC's "Trading Nation" on Friday. "We could go a little deeper."
Gordon's comments came as the major indexes got hammered. The Dow, S&P 500 and Nasdaq saw their worst weekly performance since March. The S&P closed back in correction territory, down more than 10 percent from its Sept. 21 all-time high.
He believes the correction will span about two to four months, citing the end of the 90-day trade war cease-fire between the U.S. and China as an important marker.
"The sources of risk right now are really exogenous, meaning they're hard to forecast," Gordon said. "They're risks obviously tied to trade restrictions and the tariff escalation."
Trade has been Gordon's major risk factor for U.S. stocks for much of the year. In late June on "Trading Nation," he placed the U.S.-China tariff threat as a major economic risk in the second half of 2018. And, that issue has played a big role in the painful pullback.
"You could have full-on global growth slowing as a result of a complete breakdown in the trade and tariff negotiations," he said, even though it's not his base case.