It's not true that long-only funds destabilize the market. Those funds invest only in long positions, but in the futures market a long position always has a short counterpart. It's like stock options: in order to buy a call option you need someone to sell it to you. That seller will be short on the stock.
The author of the article doesn't seem to understand that.
He says:
> The managers of this new product would acquire and hold long positions, and nothing but long positions, on a range of commodities futures. They would not hedge their futures with the actual sale or purchase of real wheat (like a bona-fide hedger), nor would they cover their positions by buying low and selling high
But that is irrelevant since there were other market participants selling the futures. The author also fails to understand that rolling a contract implies covering your position at contract expiration and then buying another contract.
The author of the article doesn't seem to understand that. He says:
> The managers of this new product would acquire and hold long positions, and nothing but long positions, on a range of commodities futures. They would not hedge their futures with the actual sale or purchase of real wheat (like a bona-fide hedger), nor would they cover their positions by buying low and selling high
But that is irrelevant since there were other market participants selling the futures. The author also fails to understand that rolling a contract implies covering your position at contract expiration and then buying another contract.