Quote from FerdinandAlx:
Commodities and metals in particular have reversed this week. In the next four weeks I think we'll see a sharp correction.
Markets are reflexive which means that price trends reinforce themselves. Though at some point prices diverge too much with industrial reality and are no longer supported and sentiment changes quickly. You'll know sentiment is ripe for a changeover when the buying of "funds" is used as a base on which to forecast higher copper prices.
Seems to me that any market, even commodities, have the ability to make extraordinary moves outside the realm of what was once considered reasonable. What if prices were to double in the next six months? What would that do to all the funds that are, say, "all-in" short?