Tokyo’s Nikkei 225 index rose 0.6% after the Bank of Japan opted to keep its key interest rate unchanged. It’s been gradually raising its rate from near zero and cutting back on its purchases of Japanese government bonds to help counter inflation.

NEW YORK — U.S. stocks slumped on Tuesday under the weight of another jump for the price of oil. It was a return to form for financial markets after Wall Street’s worries about Israel’s fighting with Iran had seemed to calm a bit on Monday.