During the Cold War, Finland was officially neutral, but for pragmatic reasons leaned heavily towards the Soviets in foreign policy. There's even a word for this:
That's not the whole story. Excluding the pro-Soviet fringes, Finland always wanted to be free of Russia. When Soviet Union fell, Finland moved significantly to the west and also started inching towards NATO.
But only the real NATO membership significantly diminished the country risk that foreign investors correctly perceived in Finland.
https://en.wikipedia.org/wiki/Finlandization