[tsimionescu]

> Is insider trading a crime on prediction markets?

Yes, it is both against the CFTC's regulations and against the companies' T&Cs.

> Doesn’t it contribute to the accuracy of the pricing of prediction contracts, and therefore is good for the prediction market?

That's irrelevant, the purpose of these markets is to provide fair bets for entertainment, not information.

[efitz]

> the purpose of these markets is to provide fair bets for entertainment

Pretty sure this statement is 100% wrong. You’re describing a gambling site. Is that how governments are treating them?

[lmm]

> against the companies' T&Cs

Not a crime, or certainly shouldn't be.

[lesuorac]

Not criminal but fraud is still a crime.

But also I don't think the T&C's came into play here. This is strictly his employer (Google) told him to keep this information confidential and he didn't and instead profited from it.

[speed_spread]

By entertainment I assume you mean money laundering?