(Bloomberg) — U.S. President Donald Trump’s moves to slap an assortment of trading partners with tariffs Monday served a rude reminder to investors that a major deadline is looming with China.Global equities came within a whisker of their all-time high last month, propelled in part by swelling optimism that at least an interim U.S.-China trade deal was in the offing. Meantime, the clock kept ticking towards Dec. 15, when Trump has threatened to impose 15% levies on $160 billion of Chinese imports.“If tariffs scheduled for Dec. 15 are implemented it would be a huge shock to the market consensus,” said Sue Trinh, managing director for global macro strategy at Manulife Investment Management in Hong Kong. “Trump would be the Grinch that stole Christmas,” she said.With about two weeks to go on the China front, the Trump administration Monday hit Brazil and Argentina with steel tariffs and proposed levies on France as punishment over a tax that’s hit large American tech companies.The reminder of Trump’s self-styled tariff-man bent was enough to trigger the biggest Wall Street sell-off in eight weeks — with a little help from a weak U.S. manufacturing report. The following are the views of a number of market participants on what happens if the tariffs on China kick in Dec. 15.‘Gloomy Future’It will be “definitely risk-off across the screen,” Tongli Han, chief investment officer at Deepblue Global Investment, said in an interview with Bloomberg TV. “What happened recently makes this trade deal more costly for Chinese leaders — so I’m seeing a gloomy future for the short term, one-to-two months.”Better Luck Next YearWith the clock running down on 2019 and a prospects of a trade deal looking more remote it’s time for investors to take a little bit of risk off the table, said Steve Brice, chief investment strategist at Standard Chartered private bank, on Bloomberg TV.“It looks like it’s going to be pushed to the beginning of next year at the best case,” Brice said. The message to investors is “maybe trim a little bit of equity exposure, or certainly not chase the market at this stage. But look to do so in the next few weeks if we see a 5-to-7% pullback.”Longer term, Brice remains optimistic “the U.S. and China will still strike a deal of some sort. That will reduce uncertainty and help the global economy do well.”Optimism DashedFor Kerry Craig, global market strategist at JPMorgan Asset Management, a key concern is markets have already priced in the prospect of a trade deal that has yet to be signed.“There had been a lot of optimism built in around a trade deal and it’s still the thing that will weigh on markets over the coming months,” Craig said on Bloomberg TV. “In the meantime we need to see more of a pick-up in the global economy to really offset some of those uncertainties.”Buy the DipFor some, the retreat in equities at the start of the week already presents a buying opportunity.“I’d fade the correction today,” Eli Lee, head of investment strategy at Bank of Singapore, told Bloomberg TV.The renewed tariff pressures on South America and Europe are likely an effort to bolster Trump’s “tariff man” image ahead of a trade deal with China, he said.“With the economy in a very delicate situation, if this came on, it would seriously ratchet up the risk of a recession — and the White House wouldn’t want this situation going into the 2020 presidential election next year,” Lee said.‘Wild Day’There may be some massive initial market swings in store, said Chris Weston, head of research at Pepperstone Group Ltd. in a note to clients.“We could face a wild day,” he said. The S&P 500 is likely to fall about 2%, with currencies including the yuan, Australian dollar and Korean won also likely to move, he said. A relief rally may be in the offing afterward, particularly if there’s agreement to revisit talks in 2020, he said.\–With assistance from Cormac Mullen and Andreea Papuc.To contact the reporters on this story: Eric Lam in Hong Kong at [email protected];Gregor Stuart Hunter in Hong Kong at [email protected] contact the editors responsible for this story: Christopher Anstey at [email protected], Ravil ShirodkarFor more articles like this, please visit us at bloomberg.com©2019 Bloomberg L.P.