good dolphin wrote:
With you but I have it at ND +3.5.
What are your thoughts on buying it up to 4? I'm not schooled in the philosophy of buying points and from what I have read opinions vary widely.
The short answer is it rarely makes math sense to buy the half. Some people say never buy the half, and based on the math 98% of the time in all sports, they are correct. (I can point to certain situations in which there is a mathematical advantage to buy the half in college hoops. There used to be math advantages to buying on/off 3 and 7 in the NFL, but the books have changed that by increasing the cost to buy those halves)
Generally, the house has the advantage, though the exact % of the advantage varies depending on the sport, the point you are buying on/off and the juice. There are times though that the disadvantage is small and it is worth considering.
In my opinion, this is one of those times.
First, the math. Use the half point calculator that shows the push rates for every number in every major sport.
http://www.sbrforum.com/betting-tools/h ... alculator/If you type "NCAAFB" for the sport, the standard -110 price for the dog and the favorite, and the line of -3.5, you see that 2.51% of all college football games land on 4. So in essence, I would be buying the 1/2 point to get a push in 2.51% of the games. The appropriate price for this bet would be 116.70 to win 100.
I bought this bet for -115. So the advantage I gained gives me a net + expected value. So compared to someone holding a +3.5 -110 ticket, I have a slightly better bet since I paid 115 for a bet worth 116.70.
However, I could have bought ND at the reduced juice price of +3.5 -105. With that as the price, the fair price would have been $110.70. So my bet is not as good as if I had just taken the reduced juice. Viewed this way, I paid 115 for a bet worth 110.70.
So it's not a great bet to buy the half here, but it's not as bad as most.
There is another reason I did it -- to set up a better middle. A middle could come into play should the line drop before kick and I want to bet some back on the other side, or the game plays out in such a way that a halftime bet makes 4 a much better number than 3.5. If none of those things happen, I'm perfectly happy holding the +4.