Columnist and precious-metals expert David Yoe Williams says he thinks Federal Reserve rate hikes and other headwinds mean Wall Street's eight-year-old bull market is just months away from hitting a brick wall.

"I think it comes to a screeching halt sometime in October," Yoe said in our latest monthly Trading Strategies expert roundtable. "I think there are tremendous headwinds -- both from the [Federal Reserve] aspect and also politically.

"They're not going to come to the fore until we get to the fall," he predicted. "But when they do, I think there are going to be some serious repercussions."

How to Play 2017's Second Half

Our July Trading Strategies roundtable and accompanying special report highlights lots of ways to invest over the next six months. Click below to check out:

Employees of TheStreet are restricted from trading individual securities.

More from Video

Your Need to Know - Forward Look

Your Need to Know - Forward Look

3 Things Investors Can Do to Stay Strategic When the Market's Volatile

3 Things Investors Can Do to Stay Strategic When the Market's Volatile

How to Be a Tactical Investor in the Current Market

How to Be a Tactical Investor in the Current Market

Canopy Growth CEO: Here's What the Future of Cannabis Looks Like for Investors

Canopy Growth CEO: Here's What the Future of Cannabis Looks Like for Investors

A Guide to Investing in the Fast-Emerging Cannabis Industry

A Guide to Investing in the Fast-Emerging Cannabis Industry