President Donald Trump has teased an upcoming announcement, and JPMorgan is telling investors to get bullish in the event that it swings the market higher. On Tuesday, the president disclosed during an Oval Office meeting with Canadian Prime Minister Mark Carney that he plans to make a “very, very big announcement” prior to his trip to the Middle East next week. “We’re going to have a very, very big announcement to make, like, as big as it gets, and I won’t tell you on what,” he said, adding that “it is really, really positive” and that “it’ll be one of the most important announcements that have been made in many years about a certain subject.” To get ahead of the announcement – which Trump said he’ll make “either Thursday or Friday or Monday before we leave” – JPMorgan believes investors should buy calls, specifically S & P 500 call options. Those are contracts that give their owners the option to make an investment at a fixed price within a certain timeframe. “It’s worth hedging short-term upside risks in case it is, given other major catalysts over the next week, the potential for systematic strategy re-leveraging to reinforce an upside move, and the normalization of short-term implied volatility levels over the past few weeks,” wrote Bram Kaplan, head of Americas equity derivatives strategy at JPMorgan, in a note dated Tuesday. To be sure, investors should be cautious as the topic of Trump’s announcement is unknown. In fact, the president said in the Oval Office meeting that he’s “not necessarily saying it’s on trade.” To that point, it “may not turn out to be market moving,” Kaplan warned. But Kaplan’s thinking here is that there’s a possibility that Tuesday’s tease might be similar to the one Trump made right before the president announced a pause in the steep tariff rates for most countries for 90 days. Just hours before that reprieve sent the market on a historic swing upward , Trump said in a Truth Social post that ” THIS IS A GREAT TIME TO BUY!!! ” Investors who followed that advice consequently saw massive returns. “Over the next week, we have two other major catalysts that could move markets: the May FOMC meeting (May 7) and April CPI print (May 13),” Kaplan continued. “Should markets rally on the back of any of these catalysts, the upside move could be reinforced by CTA [trend-following hedge funds] re-leveraging, since a few key momentum signals sit around ~5800 on the S & P 500.”