Quote from darkhorse:
CAGR = compound annual growth rate.
At the end of the day, risk-adjusted CAGR is the only thing that matters, which goes back to my point, re, different strokes for different folks.
If an independent trader has access to an excellent strategy that can deliver 25% CAGR over 10 years, with low risk, and his capital base is small enough (or the strategy capacity large enough) to fully operate without capital constraints, then this trader would have zero need to look at long-term investment strategies of the WMT / AAPL type. Anything with a less desirable CAGR profile than his bread and butter approach -- again, assuming it is genuinely stable and low risk in aggregate -- has negative opportunity cost (or rather, opportunity cost as a significant negative).
This overlooks the total portfolio characteristics. For example, the WMT and similar investments is useful as a diversifier, even if the returns are lower - most speculative trading can be done on margin, so you can have a portfolio 100% long investments like WMT, and then do your normal trading 'on top' without any reduction in returns except for your cost of capital (currently tiny at today's interest rates).
Furthermore, things like global macro tend to do well when volatility is higher or rising, whereas investments like WMT perform better in quiet or falling vol markets. So having a trading portfolio collateralized by an investment portfolio reduces the volatility of returns as well as increasing absolute returns - a true free lunch.
Lastly, the true risk of an investment is not measured by its volatility but by the chance of long-term loss of capital. If a trading portfolio falls 10%, then you just suffered a loss of 10% of capital. If WMT falls 10%, the value in many cases has not changed much if at all, rather the share price has just gone down temporarily. So long as you don't have to sell any time soon, you can often just ignore the fluctuation and in most cases be confident that in future it will recover and steadily move higher. So a 10% 'loss' on an investment portfolio is not economically equivalent to a 10% loss on a trading portfolio, so long as the intrinsic value hasn't been impaired by 10% or more.
P.S. AAPL is up a lot more than 25% CAGR in the last decade, year, few months, however you mention it.