John Rogers of Ariel Investments is the largest shareholder in Madison Square Garden (MSG) and one of the largest in Madison Square Garden Sports (MSGS).

The S&P 500 index closed up by approximately 123 points, a gain of 1.7%.

The Nasdaq Composite and the Nasdaq 100 indices each closed up more than 3% on the day.

The negotiation of the Joint Comprehensive Plan of Action (JCPOA) took more than a year to complete.

The Dow Jones Industrial Average closed higher by approximately 470 points, a gain of about 0.9%.

The Russell 2000 index closed up approximately 21 points, a gain of 0.7%.