The only time that I would say to have being depressed was when MMM ponzi scheme scam nearly rendered me completely useless. I lost all of my money in the ponzi. I couldn't eat well for months. I lost all my happiness. I was lucky not to have any suicidal thoughts.
Losing appetite is one of those acts that will show that one is depressed. You will discover that the excitement of life is gone as you would always want to sleep and do nothing. Sometimes, it is never easy for those who are depressed especially when it has to do with losing money.