How Basketball Line Shifts Actually Work
A point spread opens based on the sportsbook's projection of the game, then adjusts the moment one side attracts disproportionate money. Sharp action — typically high-dollar wagers from sophisticated bettors — triggers fast, decisive moves, sometimes a full point in minutes. Public money moves lines more gradually, usually building toward game time. On a dog234 NBA board, you might see the Lakers
open at -5, tick to -5.5 after early sharp bets, then drift back to -5 if recreational money floods the opposing side. Watching that full arc, not just the closing number, tells you whose money is winning the argument. Moneyline odds on the same game shift in parallel, compressing or widening the implied probability gap.