No they aren't, it looks like the prices doubled and the government significantly cut taxes to hide the increase. That's not to mention the 3 year price spike during 2021-2023. Who's paying for the lost revenue from the tax cuts?
In the political reality of Germany there is literally 0 chance that these tax cuts won’t be extended. Low investment by BASF has many reasons, but their inability to get politicians to extend that tax cut isn’t one of them.