Growth Investing vs Passive vs Active
Growth investing selects rapidly expanding companies and holds them at higher weights than the market. Passive investing accepts market-cap weights, which already rise automatically as a company's price rises — so an index carries a built-in lean toward what has already grown.
Growth investing is an active position, which is straightforward. The less obvious part is that a market-cap index is not neutral with respect to growth either — its weights rise with price, so it accumulates whatever has been going up without anybody deciding to.
What each one is
Growth investing selects rapidly expanding companies and holds them at weights above their market size. Growth investing covers it.
Passive investing accepts market-cap weights at the lowest available cost. Passive versus active covers the argument, and factor investing covers rules-based tilts generally.
Neither is neutral about what has risen. Whereas the index takes no view, its mechanism means a company that has performed well occupies more of it — so the passive holding already leans the way the growth investor is leaning.
Where they differ
Whether the lean was chosen. The index’s lean is a side effect of the weighting rule and costs nothing. The growth fund’s is a deliberate overweight on top of it, chosen by somebody and charged for.
How much extra you get. Because the index already holds the largest and fastest-appreciating companies at the highest weights, a growth fund is concentrating an existing exposure rather than adding a missing one — which is a smaller change than the marketing implies and a more expensive one.
What the evidence supports. Value, momentum, quality and size have long-run records. Rapid revenue growth as a standalone characteristic has a much weaker one — so this is an expensive tilt toward the least-supported of the common characteristics.
What each costs. Over thirty years, 5 basis points removes 1.5% of the final pot, 20 removes 5.8% and 75 removes 20.2%. Growth funds sit at the upper end, and the fee is certain while the outperformance is not.
Where they agree
Both hold the same universe of companies, differing only in the weights and the fee.
Both fall in a market decline. On this site’s shared series 95% of bars sat below a prior peak, with the longest wait for a new high at 73 bars.
Both are undermined by switching after poor performance, which is the common failure across everything here.
And neither decides your overall mix, which is a question above both.
Which one to use
Use market weights when you have no view you can state. The lean toward what has risen comes free, requires no maintenance, and costs the least — so an investor vaguely favourable to growth already owns that position without paying for it.
Use a growth position when the view is specific and stated. A particular company, a particular reason — not a preference for the category, which the index has already expressed on your behalf.
Check how much growth exposure you already hold before adding any. In a cap-weighted fund the largest positions are usually the companies that have grown most, and the total after adding a growth fund is often much larger than intended.
And prefer quality if the appeal is well-run compounding businesses, since that is the characteristic with the record rather than expansion itself.
Why cap weighting is not neutral about momentum
Because weight is price times shares. When a price rises the weight rises with it, automatically and without a transaction — so the index systematically holds more of what has been going up and less of what has not, which is a momentum characteristic arriving as a by-product of the rule.
And because that cuts both ways. When the leaders turn, the index holds the most of exactly what is falling — which is the trade-off that comes with the free lean and is rarely mentioned alongside it.
The original data
Of the 24,971 videos in the search corpus, no title compares these two directly. Growth investing appears in 19 videos at a median of 573 views across 18 channels — the lowest median measured here. Passive and active investing appear in 6 videos at a median of 10,919 across 6 channels.
Twenty-five videos between them. The characteristic with the least support and the framework that determines everyone’s lifetime fee together account for twenty-five of 24,971 videos, against 901 on crypto.
On the chart above you already hold the position. Adding a growth fund concentrates it rather than introducing it, and the concentration is the decision being made.
When it fails
The characteristic failure is holding an index fund and a growth fund and believing that is diversified. The index’s largest weights are the companies that have appreciated most, which are substantially the same companies the growth fund holds — so the two overlap heavily at exactly the positions that matter, and the portfolio is far more concentrated in a handful of large companies than the number of funds suggests. It looks like two holdings and behaves like one, and the concentration only becomes visible when the market’s leaders have a poor period together.
A second failure is paying an elevated fee for a lean the index provides free.
A third is treating growth as a factor with a record, when it is the weakest-supported of them.
A fourth is buying growth companies because they have risen, which is momentum under another name.
And a fifth is never checking the overlap between funds, which is the only way to see the actual position. Both funds publish their holdings, so the check is a matter of comparing two lists rather than estimating anything — and the answer is frequently that the top ten names of one are most of the top ten of the other, which no amount of reasoning about diversification would have suggested.
Related
Growth investing covers buying expansion and what it costs. Passive versus active covers market weights and how they move. And factor investing covers the characteristics that do carry records.
The thing people miss about market-cap weighting is that it is not neutral about momentum — a company whose price triples has triple the weight, automatically, with no trade. So an index quietly holds more of whatever has been winning, and a growth fund on top is a second helping of the same thing.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.