TOKYO (AP) — Prime Minister Shigeru Ishiba on Wednesday vowed to remain in power to oversee the implementation of a new Japan-U.S. tariff agreement, despite media speculation and growing calls for him to resign after a historic defeat of his governing party.

The unexpected US-Japan trade deal announced Wednesday may end up being a tipping point for the fortunes of many sectors in the stock market — with losers turning into winners, and vice versa.

After months of fraught negotiations with the United States, Japan clinched a deal just days before punitive tariffs were scheduled to take effect.