Maybe it is true in case of kathmandu (I am not certain) but how can we forget the housing crisis that caused the financial meltdown in 2008........People were saying the exact same thing that you said "Inteligentguy"......and they were WRONG........all I want to say is to deduce something will continue happening in  future completely based upon past data is not a clever decision, atleast I know for sure that pricing model for any asset includes past trend and future cash flows adjusted to proper risk (market borrowing rate)