On Comex, gold’s open interest has now fallen a long way, from a high of 657,776 contracts on 11 July, to a current level of 495,457. This represents a destruction of a little over 500 tonnes of paper gold, worth $20.4bn. It is a substantial number obviously, and brings open interest down to the approximate levels that pertained at the end of May. Since that time, longer-term investors have become net buyers of gold in ETF form, and are also maintaining rolling long positions in the futures…