Global stocks spooked, oil sinks as bond markets scream recession

TOKYO (Reuters) - Asian stocks slid and oil prices extended a punishing sell-off on Thursday as investors feared an historic drop in long-term U.S. bond yields could prove a herald of recession globally.Spooked investors stampeded to the safety of sovereign debt and drove yields on 30-year Treasuries to all-time lows at 1.97%. Yields have now fallen a staggering 60 basis points in just 12 sessions to pay less than three-month debt.Yields on 10-year paper dropped to 1.55%, taking them under..