Escalating tensions on the Korean peninsula rattled nerves on Wall Street Tuesday, leading to the stock market’s worst day in almost three weeks. Bank stocks led the slide as bond yields slumped. Technology stocks, the biggest gainers this year, also pulled the market lower. Energy companies climbed the most as the price of crude oil rose. Traders also bid up shares in traditional safe-haven investments such as utilities and gold, which climbed to the highest level in more than a year. “Today the risk-off trade really is North Korea front and center,” said Jeff Zipper, managing director of investments at U.S.