Fidelity shares available to short (as of this post)::
TVIX Hard to Borrow, Available to Short: 294 Shares
Est. Annual Interest Rate: 3.000%
UVXY Hard to Borrow, Available to Short: 122,562 Shares
Est. Annual Interest Rate: 4.000%
VXX Hard to Borrow, Available to Short: 792,780 Shares
Est. Annual Interest Rate: 2.750%