This may be periodically (monthly? annually?) or whenever their current allocation deviates significantly from their desired allocation.
The reasons may be increased returns, decreased volatility or risk, etc.
It'd be interesting to know whether YOU rebalance (for whatever reason).
I've been playing here:
http://www.gummy-stuff.org/rebalancing2.htm
trying to avoid mathematical or financial arguments for or against.
I found the results interesting.
Webring


