Topic summary
Atomic clocks
Extracted from the Wikipedia article Atomic clock.
Financial systems
Atomic clocks keep accurate records of transactions between buyers and sellers to the millisecond or better, particularly in high-frequency trading. Accurate timekeeping is needed to prevent illegal trading ahead of time, in addition to ensuring fairness to traders on the other side of the globe. In 2018, the then current system known as NTP is only accurate to a millisecond.