The collapse of talks with U.S. creditors sent Argentina into its second debt default in 13 years and raised questions about what comes next for financial markets and the South American nation’s staggering economy.

A midnight Wednesday deadline to reach a deal with holdout bondholders came and went with Argentine Economy Minister Axel Kicillof holding firm to his government’s position that it could not accept a deal with U.S. hedge fund creditors it dismisses as “vultures.” Kicillof said the funds refused a compromise offer in talks that ended several hours earlier, although he gave no details of that proposal.