When using the half point calculator, if I pick NCAAB and put in odds of 100 on both sides, why do I get different prices for favorites and dogs when buying the same points?
Example: Put in 1.5 as spread, buying 1.5 points for the dog to +3 gives odds of -130.2. Then put in 3 as spread, buying 1.5 points for the favorite to -1.5 gives odds of -128.5.
Shouldn't they be the same odds because you would be buying the same 1.5 points? What am I missing? Thanks.