Adam Cheng isn’t very popular among stockbrokers. That’s because every time the Hong Kong actor stars in a new television show, there’s a sharp drop in global stock markets.

No one can explain it, but it’s happened eight times since 1993, when Cheng first starred as Ding Hai in the dramatic series Greed of Man. Only once, in 2004, has a new Cheng series not been accompanied by a drop in the stock market.