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Let me make a disclaimer to take any win probabilities and expected returns on this page with a grain of salt. I had to make assumptions about how point spreads on parlay cards were deliberately moved to either an integer or not an integer, depending on the card. My data also does not reflect the fact that lines often move from the time a parlay card is printed to the time of the game. On the one hand, the card maker may carefully set the point spreads to minimize player advantage. Read more