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Definition of speculate - form a theory or conjecture about a subject without firm evidence, invest in stocks, property, or other ventures in the hope of ga Definition of speculate - form a theory or conjecture about a subject without firm evidence, invest in stocks, property, or other ventures in the hope of ga dictionary thesaurus
What is a 'Speculator'. A speculator 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. Speculators take large risks, especially with respect to anticipating future price movements, in the hope of making quick, large gains.