The tax rate for capital income (income from stocks.. etc.) is 28%. However, the tax rate for wage income is much higher and progressive. But it's not so much of an issue for investor/trader.
It's sad those megalomaniac morons sold the derivatives market to eurex.
Look at the FOX now, three out of five days zero contracts traded, where the OMXS trades 40K+ a day. The finnish index derivatives market is dead and buried.