[Houshalter]

I don't know if it's irrational. If you, or anyone else can be more rational, and predict the market's errors, you could make huge amounts of money.

Predicting errors is hard though. You could have shorted Nintendo's stock after Pokemon go came out. But what if they started announcing more Pokemon games for mobile, and they were also huge successes?

[flukus]

> If you, or anyone else can be more rational, and predict the market's errors

You can't rationally predict irrational errors. At best you could have spotted the trend early and jumped off at the right time, but that is still speculating on the degree of irrationality.

[Houshalter]

If you can't predict them except in hindsight, well then how can you say it's irrational? If you can't tell me whether or not investing in Nintendo stocks has negative expected value, you shouldn't call people doing it irrational.

[xorcist]

Playing against irrational moves in the market in only good in theory. "The market can stay irrational longer than you can stay solvent."

[AstralStorm]

Except it can also exit faster and with a higher magnitude than expected.

[flukus]

The share price exploded from a single free game because it became a social phenomenon.

There wasn't any sort of serious financial analysis going on, just hype.

[Houshalter]

Of course there was. If a company produces the most successful mobile game of all time, and shows there is a huge interest in one of their IPs, you don't think their stock should be worth more?