Reuters - Asian shares rose while oil prices remained elevated on Wednesday ​as markets looked for signals that a shaky truce between the United States and Iran ‌will be extended.

Brent crude traded near $100 per barrel, and the greenback held gains from the previous session after Iran said the U.S. had violated a ceasefire. New Zealand's dollar remained lower ahead of an expected hold by the central bank.

Japan's Nikkei share gauge ​jumped to a record level, following all-time highs on Wall Street on AI optimism as the U.S. reopened ​after a holiday. Sentiment remains vulnerable, however, as talks continue to reach a lasting halt ⁠to the three-month-long conflict that has rocked energy markets, and central banker comments will be watched for how ​the crisis is impacting the picture for inflation and interest rates.

"The markets are just waiting for something tangible now ​when it comes to a deal between the U.S. and Iran," Kyle Rodda, senior financial market analyst at Capital.com, wrote in a note. "A lot of good news is priced in, leaving room for disappointment if something comprehensive isn't announced."

MSCI's broadest index of ​Asia-Pacific shares outside Japan, opens new tab was up 1.2%, while the Nikkei surged 1.8%.

The dollar index , which measures the ​greenback against a basket of currencies, was little changed at 99.09 after a 0.15% gain in the prior session. The euro ‌was ⁠up 0.09% at $1.1638, while the yen strengthened 0.05% to 159.19 per dollar.

Iran's foreign ministry said U.S. strikes in Iran's southern Hormozgan province represented a "gross violation" of a ceasefire. The U.S. said its attacks were defensive in nature.

U.S. Secretary of State Marco Rubio said that a deal with Tehran to halt the conflict could "take a few ​days," while Iran's Tasnim news ​agency reported that Tehran ⁠was seeking the release of $24 billion of funds frozen overseas.

U.S. crude fell 0.89% to $93.05 a barrel, and Brent fell to $99.06 per barrel, down 0.52% but following a ​nearly 4% surge in the prior session.

The Reserve Bank of New Zealand is widely ​expected to hold ⁠its key rate at 2.25%. The main event in Australia on Wednesday is the release of consumer price data for April.

At a meeting of central bankers in Tokyo, Bank of Japan Governor Kazuo Ueda said supply shocks were ⁠looming large. ​European Central Bank board member Isabel Schnabel on Tuesday advocated for an ​interest rate hike in June even if a U.S.-Iran peace deal is reached.

Spot gold rose 0.36% to $4,522.14 an ounce, while copper rose ​0.46% to $13,686.50 a metric ton.

In cryptocurrencies, bitcoin fell 0.18% to $75,883.90, and ether was little changed at $2,075.39.