FT Vest U.S. Equity Buffer ETF - March (FMAR)

FMAR is a buffer ETF, a category that has grown in popularity with risk-averse investors who want stock-market exposure but cannot stomach the full volatility that comes with owning stocks outright. The deal is simple: you sacrifice roughly the top 15% of gains in exchange for protection against roughly the bottom 15% of losses. Over a defined 12-month period (hence the monthly designation; FMAR resets each March), the fund aims to deliver returns that stay within a narrow band: if the underlying market falls, your loss is limited; if it rises, your gain is capped. It is a structured trade-off, transparent and mathematical, built on the machinery of options.

How buffer mechanics work

A buffer ETF uses a combination of long stock positions and long call and put options to create its protective band. Simplified: FMAR holds a portfolio that tracks the broad U.S. equity market, but to finance the protection, it buys put options that pay off if the market falls, and it sells call options that cap upside gains. The math is engineered so that the puts (which protect against loss) and the calls (which cap gains) roughly offset in cost.

Here is the simplified payoff structure for a 12-month period:

If the market falls more than 15%: FMAR loses no more than roughly 15%. The put options protect against deeper losses. If the market rises less than 15%: FMAR captures all of the gain, minus a small fee. If the market rises more than 15%: FMAR’s gain is capped at roughly 15%. The call options prevent you from participating in gains beyond that threshold.

These numbers shift depending on interest rates, realized volatility, and the cost of the options at the time the period begins. They are reset annually (in March, hence the name), so a new twelve-month period begins with a new set of strikes and protections.

Who this is for and why

FMAR appeals to investors who have a low tolerance for drawdowns. They want equity exposure — because stocks are the long-term engine of wealth-building — but they panic or change their strategy if the market falls sharply. For them, a simple 100% stock portfolio is too volatile; they would buy high and sell low at the worst moments. A buffer ETF offers a compromise: you can stay invested through a typical market cycle because you know your loss is bounded.

Retirees who are spending from their portfolios often find buffer ETFs attractive. A sudden 30% market drop could force them to sell at a loss to meet expenses, crystallizing that loss. A buffer that limits loss to 15% gives them more breathing room to wait out a downturn without disrupting their cash flow.

Risk-averse investors also use buffer ETFs to replace or partially replace bond allocations in a diversified portfolio. Instead of holding 50% stocks and 50% bonds, they might hold 100% stocks, 50% of which are in a buffer ETF. The buffer provides downside cushioning that allows the overall portfolio to be more equity-heavy without taking on the full volatility of unprotected stocks.

The annual reset and the sequence risk

A critical feature of FMAR is that the buffer resets each March. This means each 12-month period (April to March of the following year) is treated separately. The buffer and cap that apply to the April-to-March period are locked in at the start and apply only to that year.

This creates a timing and sequence risk. If the market falls sharply in April and May, your loss is limited. But if a strong recovery happens late in the March-ending period, bringing the market back to breakeven for the year, FMAR benefits from that recovery and participates fully (up to the cap). Conversely, if the market rises steadily from April to December, consuming your 15% upside cap, and then falls 10% in January and February, you get the full brunt of that January-February loss because you have already used up your buffer on the earlier gains.

The implication: buffer ETFs work best when market returns are relatively stable year to year. If returns are front-loaded or back-loaded into specific months, the reset timing can work against you.

Costs and the option premium

FMAR’s expense ratio is higher than a standard stock-index ETF, because the fund has to pay for the options that create the protection and cap the gains. That cost is built into the buffer and cap figures: the roughly 15% loss limit and roughly 15% gain cap are after all costs. The expense ratio is typically disclosed, but the largest cost — the value given up to finance the options — is embedded in the payoff structure itself.

This is important to understand: you are not paying an explicit fee to get protection and caps. Instead, the fund uses the returns it would otherwise deliver to finance the options. In effect, you are trading away the top 15% of upside to get the bottom 15% of protection.

Comparison to other protection strategies

An investor could achieve similar downside protection by owning 67% stocks and 33% cash, or by owning stocks and buying out-of-the-money put options directly. The buffer ETF is convenient because it packages the strategy into a single holding. But it also locks you into a specific structure and reset schedule, which may or may not align with your actual needs.

An alternative to FMAR is a simpler buffer ETF with a different reset date (First Trust issues several buffer ETFs, each named for a different month, each resetting at a different time of year). If you believe March is a bad reset date for your situation, a different month might suit you better.

The risks in detail

First: you are giving up meaningful upside. If the market rallies 25% in a 12-month period, you capture only 15% of that. Over a full decade, repeatedly capping your upside at 15% per year could leave you materially behind a simple stock index.

Second: the buffer provides protection only within the defined period. If the market falls 40% between April and March, FMAR loses 15%. But then a new buffer period begins, and the new period starts from the lower base. You do not get a “second” 15% of protection.

Third: the structure depends on options pricing. In periods of very high volatility, the cost of options spikes, and the buffer may shrink or the cap may fall. Conversely, in periods of very low volatility, the protection may be wider. The buffer is not fixed across all market conditions.

Fourth: there is opportunity cost. During a strong bull market, owning FMAR means you will underperform a simple stock index. If the market rallies steadily for five years, capping your gains at 15% per year will leave you significantly behind a buy-and-hold stock investor.

Researching FMAR

The fund’s prospectus is essential. It details the buffer percentage, the cap percentage, the reset schedule, and the specific mechanics of how the protection is calculated. It also discloses the underlying index that the buffer applies to (usually a broad U.S. equity index like the S&P 500 or a total-market index).

First Trust’s website provides fact sheets that break down the buffer and cap figures and explain how the annual reset works. Compare the current buffer and cap to prior years to see how the option market has affected the terms.

Assess whether the buffer percentage aligns with your loss tolerance. A 15% buffer protects you from typical market corrections but not from severe bear markets. In a 40% bear market (not uncommon historically), you would still lose 15% — is that acceptable to you? Or would you need a wider buffer (which comes with a lower cap on gains)?

Consider the opportunity cost: run a backtest comparing FMAR’s returns to a simple S&P 500 index over multiple years, especially over strong bull markets. How much would you have left on the table by using the buffer instead of owning stocks outright? Is that trade-off worth it to you for the peace of mind of limited downside?