• Cboe Global Markets average p/s ratio for 2017 was 6.55, a 15.16% decline from 2016.
• Cboe Global Markets average p/s ratio for 2016 was 7.72, a 2.53% decline from 2015.
• Cboe Global Markets average p/s ratio for 2015 was 7.92, a 3.26% decline from 2014.

P/s ratio can be defined as the price to sales or PS ratio is calculated by taking the latest closing price and dividing it by the most recent sales per share number. The PS ratio is an additional way to assess whether a stock is over or under valued and is used primarily in cases where earnings are negative and the PE ratio cannot be utilized.