speculate
Definitions
To form a theory or conjecture about a subject without firm evidence.
To invest in stocks, property, or other ventures in the hope of gain but with the risk of loss.
Examples
It is useless to speculate about the outcome of the election before all the votes are counted.
Investors often speculate on the future value of stocks based on current market trends.
Synonyms
conjecture surmise theorize suppose hypothesize guess postulate