On: A small-town police officer took down a large match-fixing ring in tennis

[sidewndr46]

I don't know what you mean by economic gambling

[rootsudo → sidewndr46]

Speculation. Stock markets, futures, options, etc.

[smcin → rootsudo]

'financial speculation'

[callalex → sidewndr46]

Prediction Markets come to mind as an egregious example.