Trump and Jinping met at the G-20 Summit in Buenos Aires, putting global markets on pause as the two economic superpowers met to hopefully ameliorate their trade differences. As part of the agreement, both nations agreed to withhold imposing further tariffs on each other for 90 days while they work out a firm, ironclad deal.

However, worries over an inverted yield curve came back into focus on Tuesday in conjunction with the reality that a tangible and permanent trade deal is necessary for the markets to continue responding to the upside.

“The flatter it gets, the worse it is for the market. Even worse for the market is when it’s below 50 and already inverted,” said Paul Hickey, co-founder of Bespoke. “When you get the worse performance is after it inverts and gets positive again, and that’s when you really see the market weaken.”

Related: Jim Cramer: Trump Sees ‘Cracks in Strength of the Economy’

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