The Stabilizing Role of Speculators
1. People who argue that speculation is destabilizing seldom realize that this is largely equivalent to saying that speculators lose money, since speculation can be destabilizing in general only if speculators on the average sell when the currency (commodity) is low in price and buy when it is high.
~Milton Friedman, Essays in Positive Economics (p. 175)
In other words, speculators who continually lose money by buying high and selling low (which would increase volatility and be destabilizing) will be forced to leave the market eventually, and only rational speculators – those who will actually help to stabilize prices – will survive.
2. Speculators anticipate shortages and buy up commodities early, thereby removing them from the market. This alerts consumers to the oncoming shortage, fulfilling the important financial market role of providing information and allowing them to reduce consumption as prices rise. Later, the speculator sells, ameliorating the shortage while making a profit.
Speculators anticipate and warn others about shortages—they do not cause shortages. As a result of their trades, price swings are less severe than they otherwise would have been. We do not blame doctors, police, or firemen for profiting from the misfortune of others because it is understood that they help a bad situation. Speculators deserve the same consideration.
~Joetta Forsyth, Learning to Love Financial Market Barbarians