speculate

Market liquidity and efficiency

By contrast, a commodity speculator may profit from the difference in the spread and, in competition with other speculators, reduce the spread. Some schools of thought argue that speculators increase the liquidity in a market, and therefore promote an efficient market. This efficiency is difficult to achieve without speculators. Speculators take information and speculate on how it affects prices, producers and consumers, who may want to hedge their risks, needing counterparties if they could find each other without markets it certainly would happen as it would be cheaper. A very beneficial by-product of speculation for the economy is price discovery.