A sell-off in tech stocks gripped U.S. and Asian markets overnight after an earnings report from Broadcom earlier in the week.

A sell-off in tech stocks gripped U.S. and Asian markets overnight after an earnings report from Broadcom earlier in the week.

European stock markets had a mixed opening, as shares fell in Asia, with South Korea's benchmark dropping more than 5%. This comes as US markets saw sharp declines in several…