You're of the betting variety, how much of a difference does a 1 point overall drop make? And isn't a drop from being favored 5.5 to 4.5 just an indication that more bets (money) is coming on on the Sparty side?
I mean being favored by 5.5 means to win that bet (if you're betting on Nebraska) the Huskers have to win by 6+. 4.5 means a win by 5+, right?
So what, or how much, of a difference does that 1 point drop make? Are there analytics showing that a 1 point drop (or gain) is significant?
A brief tutorial on football gambling. The house makes their money when an equal amount is wagered on both teams. They get 10% of every dollar wagered on either side and they are happy, regardless of the result of the game. When a spread changes from 5.5 to 4.5, that means the underdog is getting more betting action but not necessarily a significant amount more because not many games land on a 5 point difference. The house gets nervous when a spread moves off of a common football score, like 3,4 and most commonly 7.
Example
Let's say the Huskers were favored by 7.5, and all the money is coming in on MSU. The house knows they have to move the line to get more Husker bettors and balance the book but are more reluctant to do so because moving the line to 6.5 may mean they will take a royal ass-whoopin if the Huskers were to win by 7, which is a common difference in the score of a football game.
To keep it simple, the line starts 7.5 and everyone is on MSU, with $1000 wagered on them, and only $200 on Nebraska. The bookies are nervous if MSU covers, they are going to get hit pretty hard, so they are forced to move the line down to 6.5 to get more action on the Huskers. Well, many Husker fans are thinking "If the line drops below 7, I'm taking the Huskers. It does, and now $1000 have been bet on the Husker to cover the 6.5.
The Huskers win the game 28-21, and the house gets beat on both sides. The early action on MSU getting 7.5 and the late action on Nebraska giving 6.5.
When the line moves from 5.5 to 4.5 it is not that big of a deal. The house is prodding Husker fan to get with the program but are not too concerned.
Any line with an increment of 7 makes the house nervous if they have to cross that threshold to balance their book.
13-15
20-22...etc.
also anything crossing over 10.
Hope this makes sense.