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The transcript below has been edited for brevity and clarity. FTAV: In Trading at the Speed of Light you describe high-frequency trading (HFT) as both Einsteinian and mundane. What do you mean?

Its happy speed is 75 mph. At 75, it’s settled on its springs, the steering is light but very direct, with your hands rested in a relaxed, underhand grip on the bottom of the thin-rimmed wheel.

This, of course, is light, traveling as it does at the absolute speed limit of the Universe: 300,000 kilometers per second (186,000 miles per second).

Light is faster than anything else in the known universe, though its speed can change depending on what it's passing through.

In this case, he imagined travelling in a superfast tram at the speed of light, c. With that in mind, I felt that some of the previous answers fell short, as they considered the scenario of ...