Corps decreasing value (Golden Rainbow)

My corps in my country "The Empire of Mraw" has been decreasing in value by 50-200 billion a month. It used to be around 6-7 trillion, it started decreasing as I had more employees and when it reached 100%, which is rather odd, wouldn't it go up when production output goes up?

Have you been auto upgrading corps?

Just one Corp, why?

Because corps upgraded produce higher profit and increase in worth.
Happened to me too.