On your story on Infosys I would like to add that a high EV alone may not indicate anything great. The EV may be high due to too much debt (as Mkt.cap+Debt-Cash =EV ) High EV definitely means one thing : it is "costly" to take over Infosys compared to other IT firms in its category. But it doesnt say anything on whether it is a "valuable" to do so.
