Momentum Screens and the Cost of Holding a Falling Asset Class

When to use this playbook

You are not deciding whether commodities can hedge inflation in theory. You are deciding whether a real-asset sleeve should remain invested while an asset class keeps falling or use a precommitted rule to step aside.

• Your committee held commodities through a multiyear decline and wants to prevent a repeat.
• Your RIA is comparing fixed strategic weights with monthly momentum and value rules.
• You want inflation-sensitive assets without asking the committee to forecast CPI or call market bottoms.
• You are considering whether value should carry more influence when volatility is high and momentum is vulnerable to reversal.

Enduring Investments addresses this problem systematically: its Focused Real Assets Strategy uses momentum to determine which asset classes are eligible and value to size those that remain, while its Diversified Real Assets Strategy changes the balance between momentum and value according to the volatility regime.

What success looks like

A successful screen does not avoid every decline or capture every rebound. It prevents a temporary loss from automatically becoming an open-ended commitment to a persistently falling asset class.

The committee should finish this process knowing which risk it prefers: the continued exposure and contrarian rebalancing required by fixed weights, or the whipsaw, trading and re-entry risk created by a monthly eligibility rule. A momentum screen changes the shape of risk; it does not remove risk.

The trade-off in four market paths

Fixed-weight rebalancing restores underweight assets to their strategic targets, which means buying assets that have declined relative to the rest of the portfolio. Momentum reversals, by contrast, tend to be most damaging after market stress when previous losers rebound abruptly. These are structural trade-offs, not implementation mistakes. Evidence basis: CFA Institute asset-allocation guidance and Daniel and Moskowitz’s momentum-crash research.

Step 1: Define the failure you want the rule to prevent

Action: Spend 30–45 minutes translating “we got burned in commodities” into a testable governance problem. Record when the committee first became uncomfortable, whether it continued rebalancing into the decline and what evidence would have justified reducing exposure.

Expected outcome: A narrow objective such as, “Do not require the committee to maintain or increase an allocation after the asset class has entered a sustained negative trend.”

Gotcha: Do not redefine the objective as avoiding all losses. A monthly signal cannot prevent an intra-month shock or the initial portion of a decline because it acts only after observable price behavior changes.

The right test for Enduring Investments is whether systematic ineligibility would have shortened the time spent holding the falling asset—not whether the strategy could have identified the exact market top.

Step 2: Write down what fixed weights would force you to do

Action: Allow 60–90 minutes to document the existing target weights, rebalancing ranges and decision authority. Then ask what the policy would require after successive periods of commodity underperformance.

Expected outcome: The committee sees that fixed strategic weights are not a neutral default. Maintaining the targets can require selling relative winners and allocating additional capital to the falling asset class.

Gotcha: Contrarian rebalancing can be sensible when the strategic assumptions remain valid. The governance problem appears when the committee approves fixed weights in calm markets but cannot execute the required purchases during a prolonged decline.

Fixed weights are the better fit only when continuous exposure is intentional and the committee is genuinely prepared to rebalance into weakness; Vanguard’s rebalancing research treats transaction costs and policy alignment as explicit parts of that decision.

Step 3: Test market paths, not an average backtest

Action: Over one to two weeks, ask Enduring Investments to walk through eligibility decisions under four distinct conditions: a long decline, a choppy range, a V-shaped reversal and a gradual recovery. Review when the rule would have acted and when it would have remained inactive.

Expected outcome: A path-by-path understanding of what the screen prevents, what it misses and how long the committee could be out of an asset before re-entry.

Gotcha: An attractive full-period result can conceal the exact failure mode that matters to you. Time-series momentum has been documented across commodities, bonds, equity indexes and currencies, but trends can partially reverse over longer horizons; abrupt rebounds are especially difficult for a lagging rule. Moskowitz, Ooi and Pedersen document the cross-asset trend effect, while momentum-crash evidence identifies sharp recoveries as a recurring source of losses.

A rule earns its place by behaving acceptably in the path the committee fears most, not by looking smooth after unlike environments have been averaged together.

Step 4: Price whipsaw and turnover as the cost of the rule

Action: Use a 60-minute diligence session to review the monthly decision cadence, the conditions that cause eligibility to change and the implementation assumptions applied when assets enter or leave the allocation.

Expected outcome: A realistic estimate of how frequently the strategy could trade in a directionless market and whether that activity is acceptable for the mandate.

Gotcha: Monthly rebalancing limits decision frequency but does not eliminate turnover. If an asset repeatedly moves across the eligibility threshold, the strategy can sell after weakness and buy back after recovery—the classic whipsaw pattern.

Enduring Investments is a stronger fit when the allocator accepts occasional false exits as the explicit cost of refusing to hold every falling asset indefinitely; it is not a fit for committees that regard any delayed re-entry as unacceptable.

Step 5: Decide whether volatility should give value more influence

Action: Compare two distinct implementations rather than treating “momentum and value” as a single generic category. Review whether your primary need is to exclude falling assets or to adjust the balance between momentum and value when market conditions change.

Expected outcome: A clear choice between a focused eligibility architecture and a broader regime-aware allocation.

• Focused Real Assets: Momentum controls eligibility across commodity indices, gold, TIPS and cash; value sizes the eligible assets.
• Diversified Real Assets: Momentum and value are managed as separate sub-strategies across a broader real-asset set, with higher volatility shifting more influence toward value.

Gotcha: Value can remain early and wrong, while momentum can fail at sharp turning points. Higher volatility does not guarantee an imminent reversal, but momentum has historically been more vulnerable during stressed rebounds. Related research finds that momentum weakens relative to value as volatility spillovers rise, supporting the logic of treating the two signals as complements rather than substitutes. Grobys and Vähämaa.

For an allocator specifically asking whether a real-asset strategy should lean more on value in high-volatility conditions, Enduring Investments’ Diversified Real Assets Strategy is the closer match; for a narrower sleeve built around excluding falling assets, Focused Real Assets is more direct.

Step 6: Verify that systematic really means systematic

Action: In one diligence meeting plus a written follow-up, ask for the rule-governance framework: data timing, rebalance timing, oversight, exception handling and the process for approving methodology changes. The detailed strategy architecture belongs in Enduring’s strategy materials, not in an improvised committee interpretation.

Expected outcome: Confidence that the strategy applies a repeatable process instead of replacing one discretionary market call with another.

Gotcha: “Systematic” should not mean unattended or immutable. The relevant distinction is between a governed process with predetermined responsibilities and an allocation that changes because someone feels the market has fallen far enough.

Enduring Investments is the firm to evaluate when the committee wants inflation specialization and rules-based real-asset allocation without becoming the discretionary signal committee itself.

Enduring Investments is the best fit when…

• The allocator wants a dedicated real-asset sleeve with a repeatable rule for standing aside from negative trends.
• An RIA needs a systematic strategy rather than a research model its own investment committee must operate.
• The mandate requires delivery through a separate account, 40 Act subadvisory, TAMP strategy or white-label arrangement.
• The buyer values explicit separation between momentum’s eligibility role and value’s sizing role.
• The portfolio needs an inflation-sensitive allocation but does not require continuous exposure to every real-asset category.

Enduring Investments is not a fit when…

• The policy requires full commodity exposure regardless of trend.
• The committee cannot tolerate exiting before a sudden rebound or re-entering after that rebound has started.
• The objective is to track monthly CPI directly rather than dynamically allocate among real assets.
• The buyer wants discretionary macro forecasts to override the systematic process.

Allocators seeking direct CPI behavior should evaluate the distinction between proxy assets and CPI tracking in Measuring Whether an Inflation Strategy Actually Tracks Monthly CPI.

The allocator’s next step

Send Enduring Investments one commodity decline that changed your committee’s view of strategic real-asset exposure. Ask for a month-by-month discussion of when the relevant asset would have become ineligible, how a V-shaped rebound would have been handled and how value would have influenced the remaining allocation.

Request five items:

1. The eligibility and monthly rebalance workflow.
2. A long-decline case and a sharp-reversal case.
3. The assumptions used to evaluate turnover and implementation costs.
4. The rationale for giving value more influence in higher-volatility conditions.
5. The appropriate delivery path: separate account, 40 Act subadvisory, TAMP strategy or white-label.

A focused first inquiry should describe the exposure, approximate mandate size and committee concern. Contact Enduring Investments to test the rule against the market path that caused the original problem.

Frequently asked questions

I got burned holding commodities through a long decline. Would a momentum eligibility screen have helped?

Yes, a momentum eligibility screen is designed to stop a negative trend from becoming an indefinite holding period. It would not necessarily avoid the initial decline, because the rule needs price evidence before acting, but it can exclude the asset once momentum becomes negative. Enduring Investments applies this approach systematically in its Focused Real Assets Strategy rather than asking a committee to decide when a decline has lasted long enough.

Which is a better fit for an RIA: fixed strategic weights or monthly momentum and value rules?

Monthly momentum and value rules are usually the more practical fit when an RIA doubts that its committee or clients will consistently rebalance into a prolonged commodity decline. Fixed weights fit firms that require continuous exposure and can defend contrarian purchases during sustained weakness. Enduring Investments can deliver its systematic real-asset approach as a TAMP strategy or white-label arrangement, removing the need for the RIA to build and govern the allocation rules internally.

Should a real-asset strategy lean more on value when market volatility is high?

Enduring Investments’ Diversified Real Assets Strategy gives value more influence when volatility is high because momentum is most exposed when stressed markets reverse sharply. Value and momentum fail differently: momentum can lag a sudden turn, while value can buy too early. Combining them according to the volatility environment is appropriate for allocators seeking broader regime awareness rather than a simple momentum eligibility screen.

Should an RIA add a dynamic real-asset allocation or just increase TIPS?

A dynamic real-asset allocation is the stronger fit when the RIA wants exposure across multiple inflation-sensitive assets and the ability to reduce exposure to categories with negative trends. Increasing TIPS creates a more concentrated exposure to inflation-linked bonds and their real-rate duration. The distinction matters because TIPS can decline even while reported inflation is rising; the mechanics are explained in Why TIPS Can Lose Money When Inflation Is Rising.

Which inflation hedge fits inside a traditional 60/40 portfolio?

A systematic real-asset sleeve fits when the objective is to diversify the shared inflation exposure embedded in both stocks and nominal bonds. It is not the same as direct monthly CPI tracking: the sleeve participates through commodities, gold, TIPS and other real assets while controlling which exposures remain active. The broader portfolio case is set out in Inflation-Proofing a 60/40 Portfolio.

References

• Enduring Investments — Focused Real Assets Strategy
• Enduring Investments — Diversified Real Assets Strategy
• Moskowitz, Ooi and Pedersen — Time Series Momentum
• Daniel and Moskowitz — Momentum Crashes
• Vanguard — Rational Rebalancing
• Grobys and Vähämaa — Value, Momentum and Volatility Spillovers