Guide to the
Buffer Strategy

The Buffer Strategy is a type of hedged equity (often categorized as “low-risk”) investment strategy, designed to help equity investors:

  • maintain a level of protection in down markets
  • take advantage of growth opportunities in up markets
Why invest in the Buffer Strategy?

Why invest in the Buffer Strategy?

Protecting losses can help investors stay invested

We buy insurance on our homes, on our cars and even on our lives. However, in any given year with a 20% chance of market loss, why don’t more investors protect their investments?

Value Of Insurance

Equities offer promising growth potential for investments, but equities can be severely affected by events that are difficult to predict. Losses can have a greater impact on investments than gains, because the money left after the loss has to work harder just to get back to the original levels.

The Buffer Strategy offers an innovative approach that seeks to strike the right balance: aiming to provide a persistent level of protection to equity exposure while allowing investors to participate in some of the potential growth opportunities that equities provide.

Striving for more certainty

Investors often rely on market timing or diversifying equities with bonds to help minimize their risks from losses. But these strategies may be challenged in some market environments.

  • 60/40 may not be the answer

Many portfolios include an allocation to fixed income as a counterbalance to equities during times of market volatility. However, bonds and equities may decline simultaneously, negating the expected counterbalance benefit of diversification. Fixed income may also be challenged when interest rates rise and lose purchasing power in an inflationary environment.

  • Being cautious does not mean being in cash

Investors who sell in market downturns and wait on the sidelines in cash for the market to recover can miss out on top-performing days, which can have a big impact on returns.

When will the next pullback occur, or when will interest rates or inflation rise? While it’s not possible to predict the future, there are ways we can prepare for it.

The Buffer Strategy seeks to protect equity investors from losses with a contractual level of certainty (“contractual certainty”) that is simply not possible with a 60/40 allocation or market timing. The contractual certainty comes from options, which we will explore further. To understand the contractual nature of options and why it matters, click here.

Investment strategies like the Buffer Strategy seek to provide a higher level of certainty in investment outcomes, using options to reshape returns.

How it works

How it works

The Buffer Strategy is designed to protect investors from a specific level of downside losses in a reference asset while allowing participation in potential growth up to a predetermined cap for a specific outcome period.

The strategy’s returns will be a function of the level of the reference asset at the end of the outcome period relative to its level at the start, as illustrated below

Capped Upside

If the reference asset appreciates more than the cap level:

The Buffer Strategy seeks to provide a total return that equals the predetermined cap level.


If the reference asset appreciates, but less than the cap level:

The Buffer Strategy seeks to provide a total return that increases by the percentage increase of the reference asset, up to the predetermined level.

Protected Downside

If the reference asset decreases by less than the buffer:

The Buffer Strategy seeks to not participate in losses.


If the reference asset decreases by more than the buffer:

The Buffer Strategy seeks to provide a total return that is better than the price returns of the reference asset by the buffer percentage.

Explore potential Buffer Strategy outcomes

Choose a downside buffer for a hypothetical Buffer Strategy using SPDR® S&P 500 ETF Trust (SPY) as the reference asset.

What’s under the hood?

The Buffer Strategy aims to protect an investment through the use of options, which have contractual features that provide a formulaic payment based on the performance of a reference asset. The payment for options is dependent on the performance of the reference index being above (in case of a call option) or below (in case of a put option) a predetermined price (strike price) on a specific date in the future (exercise date). The contractual nature of options makes them similar to personal property insurance contracts, as they make a payment on a future date that is contingent on an event taking place.

The Buffer Strategy is constructed from a combination of call and put options with an expiry corresponding to the outcome period, overlaid on an exposure to the reference asset. The overlay strategy has two components, as illustrated in the following example where the reference asset is the S&P 500 and the downside buffer is 0 to -10%.

  • Protection component

The strategy includes buying a put spread on the S&P 500 Index — a combination of buying a put option on the S&P 500 Index with a strike price that is close to the level of the S&P 500 Index and selling a put option on the S&P 500 Index with a strike price that is approximately 10% lower than the level of the S&P 500 Index. The strategy must pay an upfront premium in exchange for the right to profit from the index’s decline between the level of the S&P 500 Index and approximately 10% lower than the level of the S&P 500 Index. This potential profit from the options overlay offsets the losses from the existing exposure to the S&P 500 Index and is what creates the protected downside range of the Buffer Strategy.

  • Capped component

The strategy sells call options on the S&P 500 Index to give up the right to the index’s future price appreciation above the strike price, in exchange for upfront premium income, which creates the capped upside range of the Buffer Strategy. The strike price of the call options sold and, as a result, the upside cap level is set such that the premium paid for the protection component of the strategy equals the premium collected for the capped component of the strategy.

How to invest

How to invest

Investment products

Buffered notes and buffered annuities provide access to the Buffer Strategy and provide similar targeted outcomes, but may have unique risks, including concentrated credit risks, lack of transparency and lack of liquidity.

In 2016,Vest launched a mutual fund which was the first 1940 Act product to offer access to the Buffer Strategy, in a potentially more transparent, more liquid and more familiar investment vehicle. Today the strategy is available in various investment products offered byVest and its partners.

Investment strategies and terms

Vest provides various versions of Buffer Strategies on different reference assets, with different levels of protection, over different outcome periods. Prospective investors can use the Estimated Cap Tool to see the estimated caps and terms for hypothetical Buffer Strategies.

Strategic or tactical hedging

Buffer Strategies are available as single, “fixed-term” strategies and diversified, “laddered” strategies (as seen in the video at the top of the page). Investors often ask whether to invest in a fixed-term or laddered strategy. The optimal approach usually depends on the investment objective and risk tolerance.

Fixed-term strategies, which provide a solution over a specific investment term, can assist investors in timing the market or hedging tactically. A ladder of Buffer Strategies, on the other hand, can diversify timing risk, similar to how laddered bond portfolios seek to manage timing risks for bond investors.
Learn more about laddering.

In general, the best practice is for investors to:

  • Use a diversified/laddered approach for a strategic ongoing level of protection.
  • Use fixed-term strategies for tactical trading/protection.

The research paper on S&P 500 Index Buffer Strategies discusses the two approaches in depth, and provides guidance on fitting the portfolio design to investment goals.

Where it fits in the portfolio

Where it fits in the portfolio

The Buffer Strategy can fit in two places in an investor’s portfolio:

  • Low Risk/Hedged Equity

    A common way to reduce downside risk is to lower the allocation to equities. However, this creates the risk of missing out on potential upside. The Buffer Strategy, in contrast, seeks to deliver some potential upside from equities with reduced downside risk, allowing investors to stay persistently invested.

  • Alternatives

    The Buffer Strategy’s risk/return characteristics provide lower downside risks through capping some upside, similar to alternative investments such as hedged funds. As a result, the Buffer Strategy may be used as a potentially cost-competitive replacement to hedge funds.

Diagram: Where It Fits in the Portfolio

The white paper, Risk Management 2.0, provides a quantitative risk/return framework for evaluating Buffer Strategies in the context of traditional 60/40 and 50/50 equity/bond allocations and guidance on how to deploy them in investment portfolios.



Selecting and combining Buffer Strategies

Fixed-term Buffer Strategies with varying levels of protection can be “blended” or combined to achieve specific risk objectives and/or potentially improve the risk/return of multi-asset portfolios.

For example, an investor may invest in an 80%/20% blend of “Buffer” (0 to -10% protection) and “Deep Buffer” ( -5% to -30% protection) Strategies, respectively, beginning in a specific month, to achieve a specific risk objective.

The Scenario Analyzer Tool suggests the potential optimal blend of strategies and corresponding potential returns for various reference asset levels and scenarios.

Estimating potential returns before the end of the outcome period

The Buffer Strategy is designed to protect an investment over a specific outcome period, and its value is determined by the price of the reference asset at the end of the period. Because Buffer ETFs and mutual funds offer liquidity and price transparency, investors have the flexibility to purchase or sell them during the outcome period.

These “intraperiod investors”—who invest in the strategy after it starts, or sell before it ends—will, however, have different outcomes than individuals who invested at the inception and held the Buffer ETFs or mutual fund until the end of the outcome period.

The Intraperiod Pricing Tool provides intraperiod valuations based on the Black-Scholes model.

The tool takes into account the remaining time in the outcome period, along with investors’expectations of volatility, dividend, interest rate, and price of the reference asset.

Evaluating the performance of buffer investments – did the fund deliver?

The Buffer Strategy is designed to target a specific level of protection – and uses the contractual certainty of options to that end. The actual performance of each buffer investment is contingent on the product design and the expertise of the portfolio management team running the strategy. There are a number of potential issues that can lead to slippage, such as distributions, dividends, poor tax management, etc.

Reviewing the performance of buffer investments that have completed their outcome period compared to the performance of the reference asset and relative to the stated investment objective can give investors a sense of the prowess of the Fund manager.

Additional research & videos

Additional research & videos