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Does it have pictures and pop ups? If no, I'm not interested.
Some of this stuff is way above my pay grade. Never made it that far in college.
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it's is EXACTLY what you are looking for; that text provides excellent guidance on the process of "asset allocation" -- which is a fancy term for avoiding over-concentration in a single asset class, and taking some of the emotion out of buying and selling asset classes. importantly, it helps prevent "performance chasing", which is a destructive emotional tendency to continue to purchase an asset class that has already gone up for a long period of time, and gone up well beyond it's intrinsic value. the gold bugs in GD can help you out with understanding this concept of "performance chasing"...
https://en.wikipedia.org/wiki/Asset_allocation
http://www.forbes.com/sites/mitchelltuchman/2015/03/20/investing-basics-what-is-asset-allocation/#4a66054e394f
and, you can take "asset allocation" to finer granularity than is portrayed above.
for example, a view of your equity (stock) holdings may indicate that you are under-weighted in large caps; hence, this would drive new investment in large cap ETFs and/or mutual funds. similarly, in 5 years you may see that you are over-weighted in large caps (due to appreciation). this would signal a move towards mid- or smaller cap holdings.
*very simplistic asset allocation example*:
rule: tulips should not exceed 50% of my portfolio.
rule: gold should be between 30% and 40% of my portfolio.
rule: cash should never be less than 20% of my portfolio.
rule: asset allocation should be done on 6 month intervals.
so you take $100 and invest it.
$40 of tulips
$30 of gold
$30 of cash.
-------
$100
over time, tulips appreciate -- a lot. gold drops a bit. and, you have also save a bit more money.
at the six month check, you find that you have
$80 of tulips
$25 of gold
$45 of cash.
-------
$150
so:
the "tulip rule" is being violated. you sell some tulips to "rebalance".
the "gold rule" is being violated. you buy some gold to "rebalance".
$50 of tulips
$50 of gold
$50 of cash.
-------
$150
you will notice from the above that tulip profits were converted into gold and cash. inherently, the process of following your "rules" forces you to, over time, move out of things that have appreciated a lot and into things that have appreciated less (aka depreciated). this, in turn, defeats the natural human tendency to "chase" high performers. drawing from my example above, that method would involve buying MORE tulips as they get more and more expensive to own -- and we all know that approach does not end well, whether it is tulips or gold. similarly, holding too much cash for too long presents a different kind of risk. asset allocation also gives you an advantage in getting out ahead of asset class rotation; see, for example, the periodic tables of asset class performance published annually by Callan or Prudential etc
e.g.
https://investment.prudential.com/util/common/get?file=1D065355D2CC360385257B7D00536F8A
understanding and applying asset allocation has been shown to be the greatest factor in long term portfolio success.
ar-jedi