Call it the Trump premium.

Borrowing costs jumped in the wake of Donald Trump’s unexpected U.S. presidential election victory in November, inducing Latin American governments and companies to postpone at least $10 billion in international-bond deals. Now that volatility has started to cool, as most of these issuers eye a return to market in the first quarter of 2017, the worry is that so many deals competing against one another will further drive up yields.