FT Alphaville commented on gold lease rates in Make your own (collateralised) gold standard.
My comment pointed to the fact that much of the conversation on negative lease rates is not considering the fact that storage costs are rising. These rising costs encourage gold owners to lend gold out temporarily so they save themselves the hassle of footing a hefty storage bill, and they may be so eager to avoid this bill that they are willing to pay others a fee to take on the burden. Thus negative interest rates.
See Negative Lease Rates at Gold Chat