LONDON, Aug 5 (Reuters) - Short VIX futures exchange

traded funds (ETFs) fell sharply on Monday, as Wall Street's

most-watched indicator of investor anxiety logged its largest

ever intraday jump, while stocks globally tanked on fears of a

sharp U.S. economic slowdown.

The ETFs, which reflect bets on weakness in the VIX index,

fell as much as 28% as the VIX jumped over 40 points to

a high of 65.73.

Other ETFs were down around 17% each.