General Electric ironically was started right after the Great Deleveraging of 1873 that was the bubble before the depression that was just like this one.
The truest answer to your question is that there are as many reasons for a 12-year-old to be depressed as there are 12-year-olds, but that doesn't do you much good, so let me try to give you a little sense of what science has taught us in general about depression in kids.
Across the board, about 23% of the mothers in the study were depressed, which is quite a bit higher than the rate of depression in the general public (which is about 6.7%, according to the National Institutes of Mental Health).
