Pacer Lunt MidCap Multi-Factor Alternator ETF (PAMC)

The Pacer Lunt MidCap Multi-Factor Alternator ETF (PAMC) is an actively managed exchange-traded fund that builds a concentrated portfolio of mid-sized U.S. companies by applying a quantitative multi-factor screening process. Rather than tracking a fixed benchmark, it rotates through various financial metrics — growth, value, quality, and momentum — to identify equities that meet evolving criteria in a rules-based framework.

PAMC — key facts

Multi-factor investing relies on quantitative screens across several financial dimensions at once.


Ticker	PAMC (NYSE Arca)
Sponsor	Pacer ETFs (managed with Lunt Fitzgerald)
Fund type	Actively managed ETF
Underlying	U.S. mid-cap equities (market cap $3–$10 billion range)
Strategy	Multi-factor screening with rotational selection
Portfolio size	~30–40 holdings
Expense ratio	~0.75–0.85% (active management costs apply)

The multi-factor approach

PAMC does not simply hold a static mid-cap index or a randomized slice of mid-sized stocks. Instead, the fund employs an active management process that applies multiple financial metrics simultaneously — in particular growth indicators (earnings growth, revenue expansion), value metrics (price-to-earnings, price-to-book), quality measures (return on equity, debt levels), and sometimes momentum or other quantitative signals. The algorithm screens the investable universe of mid-cap equities against these criteria, rebalancing on a regular schedule to adapt as conditions change.

This multi-factor framework is not new; the academic literature on factor premiums has long suggested that combining uncorrelated metrics — a stock that is both cheap and has good growth, for instance — can improve risk-adjusted returns compared to single-factor strategies. The “alternator” component of PAMC’s name refers to its willingness to shift the weightings and emphasis of these factors as market conditions evolve, rather than holding one fixed formula year after year.

Concentrated holding and active rebalancing

A notable feature of PAMC is its concentrated portfolio size. With only 30 to 40 holdings, the fund accepts higher single-stock risk in exchange for the conviction implied by that concentration. Each position is a meaningfully sized piece of the total portfolio — a significant bet rather than a diluted holding in a thousand-name index fund. This concentration means that the fund’s performance is driven largely by the active judgment and quantitative model of the managers, not by the diversification smoothing effect of a broad market index.

The fund rebalances on a set schedule, typically quarterly or semi-annually, which forces a disciplined process: holdings that no longer meet the screening criteria are rotated out, and new candidates that pass the metrics are added. This mechanical approach removes emotional timing from the decision and ensures the process stays true to its rules rather than drifting based on manager whim.

Risk and tracking considerations

Because PAMC is actively managed, it will deviate meaningfully from the mid-cap benchmark. In years when the factors it favors perform well, the fund can outperform; in years when they underperform, PAMC can drag. There is no guarantee of outperformance, and the active management fee of 0.75–0.85% annually is a real drag relative to a low-cost passive mid-cap index fund (which might cost 0.05–0.15%).

Mid-cap stocks themselves are riskier than large-cap equities and less liquid than mega-cap names — they can swing more sharply in bear markets and bounce more exuberantly in rallies. A concentration strategy amplifies that volatility further. Investors in PAMC should expect higher swings and the possibility of multi-year periods of underperformance versus both large-cap and small-cap indices.

The quantitative screening process also has blind spots. A model cannot predict black-swan events, and factors that worked for decades can fall out of favor; a multi-factor approach reduces that risk but does not eliminate it. Additionally, if many funds adopt the same screens simultaneously, the strategy can become crowded, driving valuations to extremes and setting the stage for disappointment.

Who PAMC is for

PAMC suits investors who believe that quantitative factor-based selection can beat a passive mid-cap index over a sufficiently long holding period and who can tolerate concentration and volatility. It also appeals to those who want active management but prefer a transparent, rules-driven process to discretionary stock-picking. The fund is not appropriate for buy-and-forget indexers or those seeking the lowest possible cost — for them, a plain mid-cap passive fund or a broad U.S. equity index will serve better and cheaper.

For research, investors should review the fund’s annual prospectus and holdings statement to understand the exact factors being screened, the rebalancing frequency, and the historical performance versus the Russell Midcap Index (the typical mid-cap benchmark). Pacer ETFs publishes detailed factor breakdowns and back-tested performance data on its website.