Stock markets continued their march higher Friday, with the Standard & Poor’s 500 index passing the threshold of 2,500 for the first time in its 60-year history.

Wall Street is riding the second-longest bull market in history, with investors repeatedly shrugging off domestic and international turmoil as they pile into shares of technology and other companies. On Friday, for example, the rally continued despite news that North Korea had launched its second missile in a month over Japan. Instead, the market focused on strong performances from tech stocks.

Standard & Poor’s bellwether stocks index spent much of the day flirting with 2,500. In the final moments of the trading day, investors nudged the benchmark to 2,500.23, up nearly five points on the day. Other indexes, including the Dow Jones industrial average, also closed at record highs.

While the stock-buying spree continues, the market’s upward march has left some investors nervous that a geopolitical crisis or a sudden bout of bad financial or economic news could spark a downturn.