Nikkei hits 31-year high

Investors pushed Tokyo's benchmark stock index to a 31-year-high on Tuesday. They're increasingly hopeful progress in Japan's vaccine rollout will make it possible to re-open the economy.

The Nikkei Average closed the day at 30,670, up 0.7 percent from Monday's close. That's a level not seen since August 1990.

More than half of Japan's population is now fully vaccinated. That news prompted investors to buy across a wide range of sectors in the morning session.

Increasingly bullish sentiment has driven more than two weeks of gains on the index.

Expectations that Prime Minister Suga Yoshihide's successor will be pro-stimulus pushed the index above 30,000 last week.

Analysts say some investors are concerned prices may be overheating.