the flaw in P/E ratio is that it is only a snapshot of what is currently happening today. For fast growing companies, it’s useless because they quickly add new

the flaw in P/E ratio is that it is only a snapshot of what is currently happening today. For fast growing companies, it’s useless because they quickly add new revenue streams and profits can change quickly. If you are purely investing off of sane P/E ratios, you might make some safe investments, but you will always be late to the party.