HAPI, the ETF Betting Happy Workers Beat the Index

David van Adelsberg, founding partner and CEO of Irrational Capital, discussed the Harbor Human Capital Factor US Large Cap ETF (ticker: HAPI) — which selects US large-cap companies on employee-satisfaction data — on Bloomberg ETF IQ with Scarlet Fu and Eric Balchunas on Sept. 14, 2026, with the fund quoted at 46.04, down 0.02% on the day.

A fund that picks American large-cap stocks according to how their employees feel about working there got an airing on Bloomberg ETF IQ on Monday. David van Adelsberg, founding partner and chief executive of Irrational Capital, joined hosts Scarlet Fu and Eric Balchunas to discuss the Harbor Human Capital Factor US Large Cap ETF (ticker: HAPI), a fund built on the premise that workforce sentiment is a measurable, investable signal rather than a soft corporate virtue.

The conversation, carried by Bloomberg Markets, put a niche corner of factor investing in front of a mainstream audience at a moment when the broad market was giving ground. The fund itself barely budged: HAPI was quoted at 46.04, down 0.02% from a prior close of 46.05, inside a day range of 45.98 to 46.09, as of the last trade at 19:56 GMT on Sept. 14.

What an employee-happiness factor actually claims

Traditional equity factors — value, momentum, quality, size — are drawn from prices and accounting statements. The human capital factor starts somewhere else entirely: from what a company's own workforce reports about the place it works. The investment argument is that this information is genuine, forward-looking and largely absent from the numbers analysts already scrape. If motivation, trust in management and a sense of purpose translate into lower turnover, better execution and fewer unforced errors, then those effects should eventually show up in earnings — and, the theory goes, an investor who reads the sentiment first gets there before the market does.

That is a bolder claim than it sounds. Most corporate-culture investing has historically been sold under the environmental, social and governance banner, where the pitch is often values-based: own the good companies. The human capital factor is framed differently. It is presented as a return driver, which means it can be tested, and it invites the harder question of whether it survives once you control for the fact that well-run, profitable, cash-generative large caps also tend to be pleasant places to work.

Why the packaging matters as much as the signal

Irrational Capital builds the underlying scoring; Harbor wraps it in an exchange-traded fund. That division of labour has become the standard route for boutique research shops that have a data set but no distribution. The ETF structure gives a signal like this daily liquidity, intraday pricing and a ticker that any brokerage account can reach — the very thing that turns an academic paper into an allocation.

It also imposes discipline. An ETF must publish what it owns and be priced continuously against those holdings, which means a novel factor is marked to market every trading day rather than presented in a quarterly letter. HAPI's tight session on Monday — a range of roughly a nickel between the low of 45.98 and the high of 46.09 — is the ordinary behaviour of a diversified large-cap portfolio rather than anything about worker sentiment. On any given day, a US large-cap fund is mostly a bet on the US large-cap market.

The benchmark comparison is the whole test

Which is exactly why the comparison with broad benchmarks is the only test that counts. On Monday the reference points were all lower: the S&P 500 tracker (SPY) was at $761.03, off 0.43% from a $764.29 close, with a range of $757.93 to $763.52. The Nasdaq 100 fund (QQQ) sat at $709.58, down 0.74% from $714.88. The Dow tracker (DIA) was at $524.65, a 0.22% decline from $525.79. Against that, HAPI's fractional dip looks like relative firmness — but one session says nothing at all about a factor.

What would say something is persistence. For an alternative factor to justify its fee and its tracking error against a cheap index fund, the outperformance has to show up across market regimes, survive attribution against the conventional factors, and not simply be a repackaged quality tilt. Investors evaluating HAPI should be asking:

How much of the return gap versus a plain S&P 500 fund disappears once quality and profitability exposures are stripped out?
How concentrated is the portfolio, and does the sentiment score systematically push it toward or away from any one sector?
How often does the sentiment data refresh, and how quickly does the portfolio act on changes?
What does the fund cost relative to a broad index fund, and how many basis points of alpha does that hurdle require?

None of those answers were established in a television segment, and none can be derived from a single day's price. They are the diligence that follows the pitch.

A crowded field for anything that isn't beta

The wider context is unforgiving. Passive US large-cap exposure is close to free, and every strategy that charges more than that has to explain why. Thematic and factor funds have proliferated to the point where distribution, not ideas, is often the binding constraint — which is why a Bloomberg appearance is itself part of the business model for a firm like Irrational Capital.

At the same time, the raw material behind the strategy has arguably never been more relevant. Employers have spent the past several years fighting over hybrid work, return-to-office mandates, and the redeployment of staff as automation and artificial intelligence reshape white-collar workflows. Whether a workforce is engaged or resentful during that upheaval is a real operational variable, and one that rarely appears cleanly in a 10-K. A fund that turns it into a score is at minimum asking a question that traditional screens do not.

The next thing to watch is straightforward: how HAPI's returns stack up against SPY and the other broad trackers over a full cycle, and whether flows follow. Investors have shown they will fund a differentiated factor if it delivers; they have shown just as clearly that they will abandon one that turns out to be an expensive way to own the index. Monday's near-flat print on a down day for all three major benchmarks is a data point, not an answer.

Key facts

Fund and ticker: Harbor Human Capital Factor US Large Cap ETF (HAPI)
Last price: 46.04, down 0.02% (as of 19:56 GMT, Sept. 14, 2026)
Day range: 45.98 – 46.09; prior close 46.05
Benchmarks same session: SPY $761.03 (-0.43%), QQQ $709.58 (-0.74%), DIA $524.65 (-0.22%)

Frequently asked questions

What does the HAPI ETF actually track?

The Harbor Human Capital Factor US Large Cap ETF selects US large-cap companies based on the happiness and satisfaction of their employees. The underlying scoring is produced by Irrational Capital, whose founding partner and CEO is David van Adelsberg. The idea is that workforce sentiment is a measurable signal that eventually shows up in company performance and share prices.

Who discussed the fund on Bloomberg?

David van Adelsberg, founding partner and chief executive of Irrational Capital, appeared on Bloomberg ETF IQ with hosts Scarlet Fu and Eric Balchunas on Sept. 14, 2026. The segment covered the Harbor Human Capital Factor US Large Cap ETF and the reasoning behind scoring listed companies on employee sentiment rather than only on financial statement data.

How did HAPI trade on the day of the interview?

HAPI was quoted at 46.04 as of the last trade at 19:56 GMT on Sept. 14, 2026, down 0.02% from a prior close of 46.05. It traded in a narrow band between 45.98 and 46.09 during the session, which is typical intraday behaviour for a diversified large-cap equity fund rather than anything specific to its methodology.

How did the broad market perform that session?

All three major US benchmarks were lower. The S&P 500 tracker SPY stood at $761.03, down 0.43% from a $764.29 close. The Nasdaq 100 fund QQQ was at $709.58, off 0.74%. The Dow tracker DIA traded at $524.65, a 0.22% decline. HAPI's near-flat print made it relatively firm on the day.

Is an employee-happiness factor the same as ESG investing?

Not quite. ESG funds are frequently sold on values — owning companies that behave well. A human capital factor is presented as a return driver: the claim is that engaged workforces produce better operational outcomes that the market has not yet priced. That framing makes it testable, and it invites scrutiny over whether the signal is distinct from a conventional quality tilt.

What should an investor check before buying a factor ETF like this?

Look at how much outperformance survives once standard factors such as quality and profitability are controlled for, how concentrated the portfolio is by sector, how frequently the underlying data refreshes, and the expense ratio relative to a plain index fund. That fee difference is the hurdle any alternative factor must clear before it adds value.

Sources

An ETF That Tracks Employees' 'HAPI'-Ness — Bloomberg Markets

Photo: Matheus Bertelli · Pexels Licence — source