President-elect Donald Trump on Thursday rang the opening bell at the New York Stock Exchange.

The Republican built his fortune as a New York real estate investor before turning to politics. During his first term as president, he measured his success in part by the strength of the stock market, which has so far welcomed his re-election.

The ringing of the bell signifies the start or closing of the trading day at the world’s largest stock exchange, and is considered an honor. The act has historically been reserved for company executives celebrating an initial public offering or other major corporate milestones, but celebrities and politicians like Ronald Reagan, Nelson Mandela and Arnold Schwarzenegger have also rung it.

Reuters contributed to this report.