There has been a general disagreement whether he made profits by speculation himself.

It's almost time for the dinner, and I will not have it ruined by speculation.

By the brightness and speculation of Mark's grey eyes he was looking forward to his adventure.

We've been disappointed before - hopes raised - only to have them dashed by excessive speculation.

Anyway, we won't solve anything else by further speculation tonight.

He amused himself for a while by speculation on that.

Just a hint here and there, fleshed out by speculation.

"I could understand how you can lose $1.3 billion by speculation," said Professor Miller.

Food prices shot up, fueled by panic and manipulative speculation.

A man sometimes makes money by speculation, but he has to have some to begin with.