By the end of the month tech aficionados will be able to walk into an Apple store in 16 countries to buy the company’s newest device – the Apple Watch. While the jury remains out on whether the watch is a tech game-changer, one of its features – the claim that it tells the time to within 50 milliseconds – raises a question about similar standards in financial markets.

If an Apple Watch can be that precise, why can't the trading industry?