- 投机者 tóujīzhě speculator
- 投机倒把 tóujīdǎobǎ speculate and profiteerto engage in speculation and profiteering
- 投机取巧 tóujīqǔqiǎo opportunisticto gain advantage by any means, fair or foul; to be opportunistic
- 投机商 tóujīshāng speculatora person or business entity that engages in speculation, often by taking risks for profit.
- 话不投机 huàbùtóujī incompatible(idiom) not on the same wavelength; unable to have a congenial conversation; to not see eye to eye
- 投机买卖 tóujīmǎimài speculationto engage in speculative trading
- 话不投机半句多 huàbùtóujībànjùduō waste of breath(idiom) when views are irreconcilable, any further talk is a waste of breath
