The New England Patriots opened as 3-point favorites over the Atlanta Falcons in the Super Bowl at just about every sportsbook in Vegas and offshore.
The Westgate LV SuperBook and William Hill opened the total at 58 -- highest ever for a Super Bowl -- and it started climbing right away.
The books opened the big game for betting before the AFC Championship Game even ended.
The 3-point spread seems right, because neither side drew a lot of early action, said Nick Bogdanovich, director of trading for William Hill US.
"Atlanta scores so much and that really draws so much of the public to them," he said. "New England has all their backers. I think you'll see 3 or 3.5 the entire cycle -- nothing else."
BookMaker.eu odds consultant Scott Cooley said for a closing number, Patriots -4 is not out of the question.
"I think there will be a lot of folks looking at this number and wondering if it's too low, but you have to remember that the public perception of Atlanta right now is extremely high given the way they finished the season and easily handled their two playoff opponents," he said.
"My guess is it will end up closer to -4 than the key number (3)."
The underdog has covered 11 of the past 15 Super Bowls. Eight of those 11 underdogs won outright, delivering big profits to money line bettors.
The Broncos pulled it off last year in a 24-10 win over Carolina as 5-point dogs. For every $100 risked by Denver money line bettors, they raked in $180.
In 2008, when the Giants upset the Patriots as nearly two-touchdown underdogs, money line bettors won as much as $475 for every $100 wagered. That was the only time in the past 10 years Nevada sportsbooks lost on the Super Bowl.
A record $132.5 million was wagered on the Super Bowl last year at Nevada sportsbooks.