If Donald Trump manages to tighten his grip on the GOP nomination by winning key, winner-take-all primaries in Ohio and Florida Tuesday, his rivals might not be the only thing dropping.

“If Trump comes out. with a clear lead—meaning that he takes both Florida and Ohio—then I think the market’s going to get nervous,” Ian Winer, head of equity trading at Wedbush Securities in Los Angeles, told BNN in an interview Monday afternoon.

But a “nervous” market is nothing compared with what we might see if Trump actually wins the White House, Winer warned. That’s when it’ll get really interesting/scary.

“If Trump becomes president of this country, the S&P [500 SPX, -0.34% will go to 1,000. People are brushing it off, but there is absolutely no way that this market—and this economy—does not get pounded,” he said. “Bad for home builders, bad for everybody, but most of all bad for the United States of America.”

So what’s the outcome bulls should be hoping for?

“People are very concerned in any scenario other than Hillary Clinton at this point, which is shocking in and of itself,” he said. “But she seems to be the most market-friendly person that we could have.”

While a Trump win and his “third grade economics” would negatively impact “pretty much anything commerce-related,” Winer did point to one area that would get a boost.

“It’d be great for Canada, because there’s going to be a heckuvalot of people looking to move their permanently,” he said. “Buy Canadian real estate.”

Read: This case for buying Canada and shorting America has nothing to do with Trump.

The host then asked Winer if he would leave the sunny weather of Southern California for the harsh winters of Canada. His answer: “I would pretty much go anywhere but here.”

More from MarketWatch