speculate on (something)(redirected from speculating in)
speculate on (something)
To conjecture, hypothesize, or make guesses about something without having supporting or conclusive evidence. You can't just speculate on what effect this legislation will have on the country—you've got to have some concrete data to show it will work! Instead of spending your energy speculating on the future, you should focus on the present and do what makes you happy.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
speculate in something
to make risky business deals in the buying and selling of something. Jeff made a fortune speculating in cotton. I do not wish to speculate in anything. It is too risky.
See also: speculate
speculate on something
to make a hypothesis about something. I really don't want to speculate on what might happen next. Would you care to speculate on what might happen if you quit your job?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.