iversification at Ratcliffe Investments What's the current situation? Sports investors around the world have reaped unprecedented returns in recent years. In the National Basketball Association (NBA), the average franchise value has increased 300% or more over the past five years. In the National Football League (NFL), team values have increased eight-fold over the past two decades, yielding an annual rate of 11.6%. In Europe, the 20 most valuable football clubs are worth an average of $1.69 billion