Sinking NFL viewership is threatening to crush ad sales

TV ratings for the National Football League have declined in each of the past two seasons.
RBC Capital Markets says that this is going to hurt ad sales as investors shy away in an increasingly competitive landscape.When it comes to TV ratings, the National Football League needs a Hail Mary.
Average game viewership has fallen to 15 million this season, down from 16.5 million last year, and the lowest since 2008, according to data compiled by RBC Capital Markets.
The firm also finds that the