As stoic philosopher, Seneca once said, “excess in anything becomes a fault.” Is that always true though? Not particularly. Sometimes honing in on a single focus can yield great results, that’s why the modern job market is so specialized. Other times though, being too narrow can leave you vulnerable, meaning you might need to find a middle ground. Suffice it to say, concentration can be both the main creator and destroyer of wealth, so where’s the right balance? Everyone is overly concentrated somewhere Passive concentration: Most investors are passive investors, and for good reason too. Timing the market is next to impossible, an emotional rollercoaster, and often unsustainable, which has led us down a natural progression favoring passivity, and ultimately, index funds. It’s a great invention, but it may have its potential pitfalls in certain market cycles like we’re in now, such as the problem of being top-heavy. For example, the S&P 500’s top 10 holdings make up almost 30% of the index’s weight. The bottom 10 don’t even make up one-tenth of a percent. Mega caps move the markets. Love it or hate it, this method has outperformed equally weighted strategies too—just compare $SPY with $RSP. Concentration via familiarity: Let’s say you’re an Apple fanatic and believe wholeheartedly in the company and its products. You can fix any iPhone issue, name their marketing director, and quote their intraday book value like your first-born child's birthday. You invest consistently in the stock over time, build a substantial position, and are up massively. But suddenly, in 2025, Apple has a mishap and drops 35% in a day. And you might have just lost five figures. It’s good to know what you’re investing in, but you can also easily hone in on one company you like to a fault, essentially putting the blinders on for risk. Compensation concentration: If you’ve been or are being compensated by your employer with equity, you may have some concentration vulnerabilities too. If too much of your net worth is tied up in company stock and stock options, your net worth may be at risk. Case in point: Netflix’s stock recently plummeted by 35% in a day after the streaming media company reported losing 200,000 subscribers in the last quarter. So what do you do about it? Determine what you're okay with. Your risk tolerance is the most preliminary step here because it’s far from the deciding factor in deciding how diversified you should be. What are your short and long-term investing goals? How much risk are you willing to take for each of those goals? Your risk tolerance and time horizon are key inputs here. Knowing where your redline sits is important and can help you determine to what degree to let your portfolio’s allocations deviate from the norm. If you’re 60 with a $1M nest egg with 50% of it in $QQQ, well... we miiiight have a problem, but if you’re 20? That’s dodgy, but maybe that's okay since your time horizon is more like 45 years (assuming you retire at 65 years old). 📈 Here's a related lesson on this topic: |