Professionals rarely do so well over 50 years that their decisions about when to get in and out of a stock lead to better performance than they might have achieved by just putting money into an index fund that buys
every stock in a particular category.
A stock index represents a group of the most heavily traded
stocks in a particular category, like the 30 largest industrial companies (Dow ®), or the largest tech firms (Nasdaq ®) and reflects the movement of the market as a whole, rather than one company.
Not exact matches
So while on a macro level you may have the correct asset allocation, you could be heavily weighted
in a
particular stock or
category unknown to you.
It's rare to see this
category stocked with Oscar contenders, but both Stone and Bening are formidable favorites
in the best actress race, and Stone is a virtual lock to win this
particular award.
A tactical asset allocation strategy calls for investing an array of percentages
in every asset class, meaning you can increase your distribution
in a
particular category when the
stocks are expected to perform well and decrease it when they're projected to perform poorly.
Your points are well made, but I think I can fairly argue that the range of yields you'll find
in a
particular property
category will still be far narrower than pretty much any other property or
stock metric you can think of...
Livestock,
in particular, demands a great deal more time and effort to
stock properly than any other
category of aquatic goods.