I am going through this thread for the first time and I am amazed about Infy's growth .I am sure except promoters and few Individuals in the company none would have held Infosys right from the beginning till now and created enormous wealth for themselves .

In stock market more difficult that buying is deciding when to sell and in case of Infy many would have made the mistake in selling rather than buying I suppose .

Bottom line : Unless and until you understand the business of a stock in   which you are investing you will end up making mistake in buying / selling or holding the stock .This is what Buffet says stick to your Core Competence .

For every one INFY there are 100 silverline.  

Exiting a stock which has given you a multibagger is a tough decision. It is like bidding farewell to your daughter post marriage but since one has analysed a multibagger for multiple years the emotion baggage is far higher then the research part. Normally valuations getting ahead of 40 times forward is the first clue to this but it is the heart that rebels against the mind.

40 times forward is that a strict rule  there are many ted stocks that are 40 timesforward  a few you own basant, i also have some so could you pl be more specific as to what exactly you mean is it 40 forward with slowing growth be a more appropiate answer