speculative
adjective
uk/ˈspekjələtɪv/ usbased on a guess and not on information:
The idea that a merger of this kind would ever take place is purely speculative.
highly/overly speculative
FINANCE
done in order to make a profit even though there is risk that you may lose money:
We should remember that a sign of the end of the first bubble was a large number of highly speculative transactions.
Company shares advanced 6p to 34p on speculative buying.
News of the sale led to considerable speculative activity on the exchange.
FINANCE
a speculative investor is willing to accept a high level of risk in the hope of making a profit:
This stock should only be considered by the speculative investor.