Around-the-clock global stock trading is becoming the order of the day.
Index options based on the Tokyo Stock Exchange's Nikkei average are traded in London and Chicago, while nighttime stock dealings have proved a boon to earnings of participating stockbrokers in Japan.
While a nighttime exchange -- advocated by the Tokyo Stock Exchange and fiercely opposed by major brokerages -- has failed to get off the drawing board, nighttime trading services launched by some brokers independently from existing exchanges have secured a wide patronage from investors.