Stock Speculators- Singular (on it on/alone) Definition take large risks, especially with respect to anticipating future price movements, in the hope of making quick, large gains. Plural (more than one) Definition-is a person who trades derivatives, commodities, bonds, equities or currencies with a higher than average risk in return for a higher-than-average profit potential.Stock Investors-Stock investors: Individuals or entities who use their own money to purchase equity securities, which offer potential profitable returns in the form of interest, income or appreciation in value (capital gains).