What a puck line actually prices

A common hockey puck line gives the favourite -1.5 goals and the underdog +1.5, with the price moving between the two sides. Alternative lines can exist, so the displayed handicap and the operator's settlement rules still need to be checked.

Why 1.5 is a lot

The favourite must win by at least two goals to cover -1.5. That is not a mild adjustment to the money line: it excludes every one-goal win. The right price therefore depends on the full distribution of winning margins rather than a simple conversion from win probability.

The empty net problem

Here is what makes it state-dependent. A trailing side may remove its goaltender for an extra attacker late in the game. If the leading side then scores into the empty net, a one-goal margin becomes two and can decide the puck-line settlement even though the match winner does not change.

That makes goalie removal, score and time remaining relevant inputs. A model that prices only the match result can miss this pathway unless it represents empty-net scoring separately.

A useful simulation separates ordinary play from the extra-attacker state. It needs a rule for when goalie removal becomes possible, plus scoring rates for both the attacking side and the side shooting at the empty net. Those rates should be estimated from relevant competition data because coaching practice and team quality can change them.

Where to look instead

The same argument applies to any derivative priced off a headline number rather than modelled directly, which is the general pattern worth watching.

What this does not tell you

None of this makes the puck line mispriced. It means only that reasoning from which team is better is incomplete. The timing of goalie removal and the scoring rates with an extra attacker or an empty net belong in the margin model, and those inputs remain uncertain.