when that person is doing his final year of graduation and no personal income is there.If yes which in which area like mutual funds or shares or another.
There is no such age limit for starting investment but only thing is you should have good knowledge about the market, trend and should be in a position to understand the factors that will influence the Stock market, it could be either MF or Shares.
I feel it is a good time to start investing (@ age of 19) however you have to be carefull while investing and make sure you are not addicted to it. At this point of time please remind the golden words by the Legend Warren Buffet :
1. Never depend on single income. Make investment to create a second source.
2. Never put all eggs in one basket.
3. If you buy things you do not need, soon you will have to sell things you need.