What Is XMMO? Invesco S&P MidCap Momentum ETF

A sector fund starts with an industry and buys within it, so its sector weight is fixed by definition. A momentum fund starts with a price signal and ends up wherever that signal points. XMMO is currently 44% industrials, 16% technology, 7% energy, 7% healthcare and 6% real estate, and not one of those figures is a target the index is trying to hit.

The holdings make the character visible. Curtiss-Wright at 4.0%, Sterling Infrastructure at 3.4%, ATI at 3.3%, TechnipFMC at 3.1%, TTM Technologies at 3.0%, Woodward at 3.0%, MKS at 2.9%, nVent Electric at 2.7%, Carpenter Technology at 2.5% and MasTec at 2.3%. Aerospace components, specialty metals, energy services, electrical equipment, electronics manufacturing and infrastructure construction.

The important implication is that this sector profile is temporary by construction. Whatever the screen picks up at the next reconstitution will replace some of it, and someone who bought XMMO because they liked the industrial and infrastructure exposure has bought a fund under no obligation to keep it. The strategy is the momentum rule, not the current portfolio.

A momentum index reconstitutes on a schedule set by its methodology, selling names that have lost their ranking and buying names that have gained it. That produces turnover well above what a broad market index fund generates, and turnover has consequences that never appear in the expense ratio.

In a taxable account the relevant consequence is capital gains distributions. A fund that sells appreciated positions to make room for new ones can realise gains and pass them through to holders, who owe tax on them in the year they are distributed whether or not they sold anything themselves. The exchange-traded structure mitigates this considerably through in-kind redemption, but it does not eliminate it for a genuinely high-turnover strategy.

There is also the spread cost of trading mid-cap names, which are less liquid than large caps and more expensive to move in size. Neither point is an argument against the strategy. Both are arguments that the 0.35% headline fee is not the total cost of ownership, and that the gap is wider here than for a buy-and-hold index fund.

Momentum works by holding what has been rising. The condition under which it stops working is a sharp reversal, when the leaders become the laggards faster than the index rebalancing schedule can move out of them. That is the specific risk in this construction and it has no real equivalent in a market-cap weighted index fund, which simply follows prices wherever they go.

Concentration amplifies the effect. At roughly 30.2% in the ten largest positions and 44% in a single sector, a reversal that hits industrial, infrastructure and metals names hits most of the fund at once rather than a corner of it. The diversification that mid-cap breadth would normally supply is partly undone by the way momentum clusters its selections.

The 0.57% yield is a further clue to what sits inside. Momentum screens select on price behaviour, and companies in a strong price run are usually reinvesting into growth rather than distributing earnings. This is not an income fund and nothing about its construction points towards it becoming one at any point.

Approximate weights as of August 2026. Each ticker links to its individual stock guide in Walnut.

There are three common ways to get XMMO exposure. Buy shares (or fractional shares) of XMMO directly at any major broker that lists it. Hold it as a core position and layer more concentrated ideas on top. Or build it into a thematic portfolio in Walnut, so XMMO sits alongside other holdings that express the same thesis, with target weights you can rebalance toward. XMMO trades like a stock during market hours, so you buy it the same way you would any listed share.

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Whether XMMO is a good buy depends less on any single call and more on your time horizon and what you already hold: it tracks the S&P MidCap Momentum Index, so the real question is whether you want that exposure in your mix and at what weight. We walk through valuation, concentration, and what would have to be true for it to outperform from here in is XMMO a buy?

XMMO gives you the S&P MidCap Momentum Index exposure in one ticker at a 0.35% expense ratio. Most investors use it as a core holding and layer more concentrated thematic portfolios on top.

Whether XMMO is worth buying today depends more on your time horizon and what you already hold than on any single call. We walk through valuation, concentration, and what would have to be true for it to outperform from here in is XMMO a buy?

XMMO yields 0.57% as of August 2026, paid by passing through the dividends of its underlying holdings. For the payout schedule, history, and how the distributions are taxed, see XMMO dividend: yield and schedule.

New to funds like XMMO? Start with what an ETF is, then how to buy an ETF, or browse the full guide to ETF investing.