The line opened with the Broncos as 3.5-point favorites. As seen on both OddsShark and the SB Nation NFL odds page, the line has gone up to four points for some books, while others have stayed at 3.5 points.
In week eight, the Broncos won by 20 after closing as six-point favorites over the New Orleans Saints. The Bengals byed in week eight, but lost by seven points to the Pittsburgh Steelers in week seven as one-point underdogs.
The over-under point total is set at 47.5 points, which comes in below two teams' scoring averages so far. Denver is averaging 29 points per game, while Cincinnati is almost 24. The Bengals are, however, in the bottom seven in points allowed.
Another factor against both the line and the over-under should be Peyton Manning against the Bengals' pass defense. Cincinnati's pass defense is at the middle of the league, while Manning is completing 69 percent of his passes for Denver's fourth-best passing offense.