Lines move to balance betting between the two positions so the house can safely take down the "vig" which is the uncovered probabilistic distance between the two opponents.
Books set an initial line based on a host of factors then crowdsource the spread based on volume of bets. But their goal isn't to look smart. It's to make money.
Books set an initial line based on a host of factors then crowdsource the spread based on volume of bets. But their goal isn't to look smart. It's to make money.