Nintendo and Sony have both seen their stock prices rise following today’s Xbox One announcement from Microsoft. Nintendo saw a rise of around 2.2 percent, while Sony saw a rise of 9.3 percent. We should remember that Nintendo’s shares also rose when Sony hosted the PlayStation 4 presentation in February. On February 22nd Sony’s U.S shares were down 2.7 percent to $14.08 by midday, with Nintendo’s shares up 2 percent to $11.79