D-St bull run hits speed bump, but what's keeping money managers optimistic? SECTIONS Share Synopsis The US 10-year Treasury bond yield spiked above the dreaded level of 1.5 per cent (bond yields rise when bond prices fall) on Thursday, in what some called a “taperless tantrum”. Getty Images The US 10-year Treasury bond yield spiked above the dreaded level of 1.5 per cent (bond yields rise when bond prices fall) on Thursday. MUMBAI: The global bond market’s tantrum is ahead of schedule. A weak US Treasury auction and fears of inflation rising faster than expected sent global bond markets into a tizzy overnight, which has today knocked the stuffing out of equities.