No exact idea but I imagine the percentage is higher than most people would think. Last year or so, there was a big thread about NBA numbers and % of the time the games fell within 3 points of it.
Although betting the NBA can be frustrating, one advantage is that in the long run your variance risk is kept to a minimum because of how the results tend to fall close to the numbers. You will get screwed with a 1 point or 1/2 point loss here or there but it tends to even out with close wins as well. It's not like in college basketball where the result of the game is way off from the number most of the time.
Although betting the NBA can be frustrating, one advantage is that in the long run your variance risk is kept to a minimum because of how the results tend to fall close to the numbers. You will get screwed with a 1 point or 1/2 point loss here or there but it tends to even out with close wins as well. It's not like in college basketball where the result of the game is way off from the number most of the time.
