5by5 | The Critical Path #51: Product Portfolio Theory  We cover
three topics:    1. Safety and air travel: the bases of
performance that don’t get rewarded   2. The unintended
consequences of litigation: US v. Microsoft and lessons learned
for Apple v. Samsung   3. Product Portfolio theory: is focus
impossible for everyone but Apple?  5by5 | The Critical Path
#51: Product Portfolio Theory.    • DesDizzy      Hi Horace
Just listened to latest CP. I sympathise with you getting beat
up over portfolio theory. I actually have worked within
financial services for over 30 years and believe portfolio
theory is rubbish. Both from a risk diversification (I am a risk
manager) and portfolio performance perspective. It is one of
those theories beloved of academics, which bears no relationship
to the real world. Historic evidence suggests that diversified
portfolio’s do not beat the benchmark, so why bother, and that
they are just as correlated during times of stress.      My
hero’s are Warren Buffet and Ian Posgate.