Trend Following ETFs: How the Price Rule Works, and Where It Breaks

A trend following ETF buys markets whose prices are rising and sells or shorts markets whose prices are falling. One rule on price makes every decision. The fund posts Treasury bills as collateral and expresses the positions in futures.

No forecast. No analyst call. No view on what the Fed does next.

I build rules-based models for advisers, so I spend my days inside signal design, position sizing and stop placement. What follows is how the mechanism actually works, with numbers: why the return should exist at all, how the entry and exit rules are set, what the fund holds, where the strategy fails, and how much of it belongs in a client portfolio. Five managers from Behind the Ticker explain the same machinery in their own words, and on two points they flatly disagree with each other.

What is a trend following ETF?

It is an exchange-traded fund that applies one price rule across dozens of liquid futures markets. Stock index futures, government bonds, currencies, crude oil, copper, grains. The fund goes long what has been rising and short what has been falling, and it runs the rule again on a fixed schedule whether or not the last trade worked.

Most of these funds sit inside the managed futures category. The wrapper is the newer part. Advisers used to reach this strategy through a limited partnership with a lockup and a K-1. Now it trades intraday and issues a 1099.

Why should trend following earn anything?

The honest answer is a risk transfer, and Jerry Prior of Mount Lucas Management gave the clearest version of it I have heard on the show.

Futures markets exist because operating companies face price risk they cannot control. A corn farmer does not know what corn will fetch between planting and harvest. An airline does not know what jet fuel will cost. Those businesses go into the futures market to hedge that risk away and buy price certainty. Somebody has to take the other side.

That somebody is the managed futures industry. In Prior’s words, his firm is "systematically owning price risk through time", and the simplest, most efficient way to accept that risk is trend following. He estimates 80 to 90 percent of the asset class runs systematically, and nearly all of it follows trends in some form.

The same framing tells you when the premium shows up. Prior points out that the strategy does best when prices are getting disrupted, moving from one level to another, which is also when long-only portfolios hurt most. When markets are calm and prices are stable, businesses need less price certainty, and there is less premium in the futures market to collect.

How does the trend signal actually work?

1. Pick the market set. Usually 20 to 100 liquid futures contracts across equities, rates, currencies and commodities. 2. Measure the trend. A moving-average crossover, a channel breakout, or plain price change over three to twelve months. 3. Set the direction. Above the threshold, go long. Below it, go short or go flat. 4. Size the position. Most managers scale by volatility so each market contributes similar risk. 5. Rebalance on a schedule. Daily or weekly, on the rule, without discretion.

Jerry Parker founded Chesapeake Capital after training under Richard Dennis in the original turtle trading program in 1983. He described the whole input list in one line: "We only look at the price of the markets", using moving averages or breakouts to produce entry and exit signals.

He also explained why he refuses to add filters. Five to ten percent of his trades in a year are the large outlier trends that pay for everything else, so a filter that improves the average trade is worthless if it screens out one of those. In his framing, you take every trade that looks like a trend, which means most of them are C and D grade setups, and the win percentage stays low on purpose.

The bet structure: tiny losses, a few enormous winners

This is where trend following stops resembling the strategies most advisers know, and it is worth being concrete.

Parker trades roughly 400 instruments at Chesapeake. Every position goes on with a predetermined stop, sized off the volatility of that market at entry, so that each bet risks about the same amount. His maximum loss per trade is "10 to 15 basis points" of the portfolio. Average holding period across his systems is about a year, and some trends run two or three.

So the loss side is small, frequent and capped. The gain side is rare, uncapped and held for a long time. A year in which the strategy pays is a year in which twenty or thirty trades out of hundreds ran a long way.

Parker is precise about the stop mechanics too. The initial stop is fixed and does not move. If the trade works, a trailing stop eventually climbs above it and takes over, and from there he deliberately tolerates large drawdowns inside a winning position: "we’ll let that thing have lots of volatility", because the data says exiting earlier costs more than it saves.

He corrected himself on one word, and the correction is the lesson. He does not want a small loss. He wants an optimal loss. A stop set too tight raises the number of times you get chopped out and have to buy back in higher.

What does a trend following ETF hold?

Open the holdings file and you will mostly find Treasury bills. A futures contract requires margin, not full payment, so the fund controls far more notional exposure than the cash it posts.

Paisley Nardini, then a client portfolio strategist at Simplify Asset Management, put a real number on the constraint. Their managed futures ETF runs a 25 percent margin-to-equity cap imposed by an outside party, and the category has historically run at 12 to 14 percent. Inside that cap, she said, they deliberately carry no sector caps and no position caps, because a small number of outsized positions is where the return comes from.

The collateral also explains a decade of weak results. Nardini traces the category’s poor post-crisis run to the fact that T-bill yield is the starting point of the return: "if treasury bills are yielding zero, that’s your starting point", and from zero the strategy has to earn everything. Higher front-end yields since 2022 changed that arithmetic.

Two structural details matter for the adviser. Many of these funds route commodity exposure through a Cayman subsidiary, because a regulated investment company faces limits on direct commodity income. And most futures positions are Section 1256 contracts, which get 60/40 long-term and short-term treatment and are marked to market at year end. The reporting is simple. The timing is not always what a client expects.

Where two managers disagree: which markets, and whether to cut in a crisis

Both arguments are live, and an adviser comparing two funds in this category will run straight into them.

Should the fund trend-follow stocks? Parker says yes, emphatically. Half his portfolio is single stocks, long and short, which almost no other manager does. His reasoning is that the usual pitch asks for a five percent allocation to hedge an equity portfolio, and he would rather apply the stop losses and the trend discipline to the equities themselves.

Prior deliberately excludes equity index futures from the Mount Lucas index, and has since 1988. He grants that trend following equities works, especially in bull markets, but says it "does that at the cost of providing less protection when needed most" and muddies the diversification the client hired the fund for. His position: people already own equities, and there are better ways to own them.

Should the fund cut exposure when volatility spikes? The industry standard is volatility scaling. Vol falls, exposure rises; vol rises, exposure falls. Prior does not do it, and his reasoning is mechanical. Trend following works best when markets are volatile, so a manager who trims into a volatility expansion is "reducing his diversification potential" in the exact week the client needed it. His index sets sector weights by risk once and leaves them alone, preferring to be roughly right rather than precisely wrong.

Parker lands in the same place from the other direction. When cocoa went to all-time highs in 2024 with wild volatility, most managers scaled the position back. His fund let it run.

When does trend following stop working?

It fails at turns, and it fails fast.

Nardini named the pattern plainly: "anytime there’s major whipsaws in the market, trend following is usually going to be caught offsides". Objects in motion stay in motion until they do not, and the rule needs a few days to reposition.

Raymond Micaletti, who runs a relative sentiment strategy and therefore has an interest in the problem, described the mechanics of a whipsaw for advisers: "a price can fall below moving average, you get out, it can rise back above it, oh you got to get in, then it goes back below". Anything driven purely by price can be whipsawed, because price is the only thing that cannot tell you about the turn in advance.

March 2023 is the sharpest example on record. On March 8 the 2-year Treasury yield closed at 5.05 percent, the highest since 2007, and trend followers had been short bonds for fourteen months. Silicon Valley Bank failed on March 10. By the close on March 13 the same yield was 4.03 percent. That is 102 basis points in three trading sessions, the fastest fall since 1987, and it kept going to 3.76 percent by March 24. A year of gains came apart inside a few weeks.

The second failure mode is slower and much harder on clients. 2011, 2012 and 2013 were three straight losing years for the trend category while US stocks climbed. Nothing was broken. Markets chopped sideways and no trend lasted long enough to pay for the false starts.

The third problem is dispersion between funds. As the two disagreements above show, "trend following" covers a manager running 22 futures contracts with no stocks and no vol scaling, and a manager running 400 instruments of which half are single equities. In a given month those two can sit on opposite sides of the same trade.

How much should an adviser hold?

Correlation to equities is close to zero over long periods, which is the entire reason to own it, and also why the fund will look wrong for years at a stretch.

Meb Faber, CEO of Cambria Investment Management, runs the most aggressive published answer. Cambria’s default allocation, the Trinity Portfolio, puts half the portfolio in trend-type strategies, and Faber notes that an adviser at 10 or 20 percent is already in the top one percent of allocators to it. He calls trend following the premier diversifier to a traditional portfolio and says it is more esoteric than value despite being just as old.

Parker built his fund as a core holding and will say so, then concedes that most of his clients put five or ten percent in an alternatives bucket and he will not make that decision for anyone.

Most adviser allocations land between 5 and 10 percent. Below that it cannot move the result. Above that the tracking error against a client benchmark gets hard to defend in a strong equity year.

The real risk is behavioral. Clients fire the diversifier in the year it lags, which is often the year before it earns its keep. Set that expectation in writing at purchase, not in the review meeting afterward.

Three questions before you buy one

1. What is in the market set? Twenty-odd futures, or hundreds of instruments including single stocks. The answer changes what the fund will do in an equity bull market. 2. Does it scale down when volatility rises? Vol scaling smooths the ride and can shrink the position in the week the hedge was supposed to pay. 3. What is the signal horizon? A three-month lookback and a twelve-month lookback are different funds wearing the same label.

Then read the collateral line in the holdings file. The T-bill yield is the floor the strategy builds on, and everything above it has to come from the rule.

Educational content only. This is not investment advice and not a recommendation regarding any security. Fund managers quoted are describing their own strategies. Index and market figures are cited as historical illustration. Investing involves risk, including possible loss of principal. Past performance does not guarantee future results.