[sigurdjs]

Other regulated commodity markets have what is called a «reasonability limit» avoid this exact kind of scenario. It is very concerning that the exchange didnt have any automated alerts that could trigger for example a phone call to verify that the order is correct.

[IndrekR]

The limits are there. -500€/MWh and 4000€/MWh. It did hit the lower limit for 10 hours in the row from 14:00 till midnight. Before 14:00 they were not the last bidder, so prices are higher there. Price on the market for everyone is set by the last bidder who fits in the predicted consumption pool.

[XelNika]

They have price limits, but I think GP means volume alert limits. Someone unexpectedly bids a third of the Finnish production capacity, you call them and ask if they are sure.

[euroderf]

Nor a suitable test suite to catch this kind of thing preëmptively.