The entire stock market runs on GPS for nanosecond timing of trades.
Funny you should mention this. At work we built a time delivery system on our fiber optic network (based on WhiteRabbit from CERN) with the national lab who generates our countries UTC contribution, and a stock market operator became one of our early customers.
Getting your timing source through fiber is definitely the best way to go, as long as you have a backup timing source OTA like GPS and other GNSS in case the fiber gets cut.
Funny you should mention this. At work we built a time delivery system on our fiber optic network (based on WhiteRabbit from CERN) with the national lab who generates our countries UTC contribution, and a stock market operator became one of our early customers.
Getting your timing source through fiber is definitely the best way to go, as long as you have a backup timing source OTA like GPS and other GNSS in case the fiber gets cut.