There are two parallel discussions going on. One is active investing. Most people think of active investing as studying individual stocks or maybe sectors and moving money around based on whatever your analysis tells you. The other is about portfolio construction. How much international, small cap, etc. should be included in an ideal portfolio.
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Re: Risk. In the financial industry risk is usually defined as volatility. However, I don't find that definition to be useful. IMO a better definition of risk is "the chance of permanent loss of capital." For example, let's say a 20 year old puts a lump sum into VTSAX and retires early at age 50. The risk of losing money over that 30-year period is effectively zero. Something catastrophic would have to happen to lose any money. Volatility really only matters in the withdrawal phase and a few years prior, and maybe not even then. The exception is if the individual has a low tolerance for volatility.
I picked an AA fairly early in my FIRE journey about 2022. I've been decreasing my bond AA since 2010 and now eliminated it. My target international has been between 15-20% and it is been hard to maintain 15% It seems every year or two when I rebalance, I'm always moving money in my IRA from domestic stock to buying VEU, or the Schwab equivalent SCHF. My international funds have very modest gains and emerging markets are negative.
I'm cutting back my AA from 15-20% to 10-15%, but it is really tempting to adopt the John Bogle view and say I get adequate international exposure from US companies foreign sales.
The correlation between US and international stocks very high and according to Morningstar
https://www.morningstar.com/articles/1034112/does-international-stock-diversification-still-work"Over the past 20 years, correlations for international stock markets have remained relatively stable, except for Latin America. That region's correlation with the U.S. equity market has trended down to 0.58 over the past five years, compared with as high as 0.80 in some previous periods."
With .90+ correlation for VEU or SCHF to VTI, I just don't see the benefit of including them in a portfolio, considering their consistent underperformance.

Looking at the big picture, when I started working in the tech industry in early 1980, there were many large and even dominant foreign tech companies Sony, Toshiba, Siemens, and SAP. New Korean companies were growing, by the mid-1980 Japan dominated the semiconductor industry and consumer electronics. Even in early 2000, companies like Nokia, and Erickson were major players, in cellphones. Linux was up and coming in software, and ARM out of the UK was well-positioned. Twenty, years later almost all of the European and Japanese tech companies are has-beens, South Korea has some great companies, but the tech giants are all either US or Chinese. The inability of Europe to create and nurture a tech giant is a source of major concern for Europe, but I see no sign that they have developed a solution.
As such, I see little true risk in many of the FAANG+Tesla stocks, by traditional measure volatility aka a stock beta FAANGT has considerably more risk than stocks, like IBM, Walmart, Wallgreens, Ford, Verizon, Chevron and other DOW stocks. So it is entirely possible that FAANGT stocks either individually or collectively could drop by 50+% over the next year or two, but I don't see the first group dropping by that much.
But if you look at say 20 years from now, I wouldn't be surprised if almost all of the traditional companies disappeared, either bankrupt or acquired at pennies on the dollar. They all have a strong competitors as well as being subjected to technology disruptions Where as I'd be shocked if more than two FAANGT companies went out of business, who is going to develop an Apple ecosystem for device in the next 20 years, or display Google on search? The market isn't being irrational valuing Tesla more than Ford, GM and Toyota combined.