Surge in Short Interest for Vanguard Total World Bond ETF The Vanguard Total World Bond ETF (NASDAQ:BNDW) experienced a significant spike in short interest, rising by 124.8% in February. The increase, from 10,100 to 22,700 shares shorted, reflects growing bearish sentiment. Despite this, the ETF maintains stability in its trading range, with a 1-year low of $66.88 and high of $70.90.1