How to Hedge Your Portfolio Against a Market Crash, and What Each Hedge Costs

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Cash, bonds, put options and inverse positions, with the price each one charges you in the years when no crash comes

Published: 16 October 2026 · Last updated: 16 October 2026 · By Spencer Li, CFTe

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“Beginner, confusion on protecting downside but not limiting upside.” That was the title of a question on Reddit’s r/options, and it sums up hedging in one line.

There are 4 ways to hedge a portfolio against a crash. You can hold more cash, spread into assets that tend to fall less, buy put options, or hold an inverse or short position.

Each one works. Each one also has a price, and you pay most of it in the years with no crash.

Cash and bonds cost you some of your gains in rising years, because the part of your money sitting in them is not riding the market up on the days it rises. Put options cost a premium every time you buy or renew them. Inverse and short positions cost you through daily resets, borrowing fees and the risk of being early.

No hedge protects your downside for free while leaving all of your upside. The job is to choose which price you would rather pay. I call this the Hedge Price Tag, and below is each tag, with real numbers.

Why does every hedge cost something?

A hedge is a position that makes money, or loses less, when the rest of your portfolio falls.

Think about what would happen if one paid out in a crash and cost nothing in good years. Everyone would hold it, and its price would rise until it did cost something.

So the useful question is never “which hedge is free?” It is “which cost can I live with, and when do I pay it?”

Hedge 1: How much does holding cash protect you?

Cash is the simplest hedge. You hold less of the thing that can crash.

Here is what a portfolio of 80% US stocks and 20% Treasury bills did against 100% stocks, using Aswath Damodaran’s historical return series from NYU Stern. The stock figures include dividends, and the mix assumes a rebalance once a year.

Cash did its job in every bad year. The 2008 loss shrank by about 7.6 points.

The price tag: cash shrinks your gains by roughly the same share as it shrinks your losses. In 2009, the cash cost more than 5 points of the rebound. You pay that bill in every rising year you hold it.

Cash also never fails in a crash. It is the one hedge on this list that cannot go wrong on the day you need it.

Hedge 2: Does spreading into bonds protect you?

The idea behind a stock-and-bond mix is that the 2 do not always fall together. When they do not, the bonds cushion the stocks.

Here is the classic 60% stocks and 40% US 10-year Treasury bonds, from the same Damodaran series:

In 2002 and 2008, bonds rose while stocks fell, and the mix lost far less, about a third of the stock loss in 2002 and well under half of it in 2008. That is diversification at its best.

Now look at 2022. Stocks fell 18% and bonds fell almost exactly as much. The 60/40 mix lost nearly as much as stocks alone, and that is the price tag.

The price tag: you give up some gains in rising years, as 2009 shows. You also carry a quieter risk. Diversification works only while the assets keep behaving differently, and nothing guarantees that they will in the next crash.

Hedge 3: How do put options protect a portfolio?

A put option gives you the right to sell at a set price, the strike, until a set date. If the market falls below the strike, the put gains value and offsets the fall. If the market does not fall, the put expires and you lose what you paid. The mechanics are in Call and Put Options Explained: How Each One Makes or Loses Money.

Take a hypothetical index at 100. A put with a strike of 90 caps your loss at about 10%, plus the price of the put. The price depends a great deal on how nervous the market is, measured as volatility.

These are model estimates from the Black-Scholes formula, with the index at 100, interest at 4% and no dividends. They are not quotes from any market.

Three lessons sit in that table.

Protection is cheapest when nobody wants it. The same 1-year put at 90 costs about 3.5 times as much at 40% volatility as at 20%. By the time a crash is under way and you finally want insurance, everyone else wants it too, and the price has already moved up to match the fear you are feeling.

It works when it is in place. Had you held a 1-year put at 90 through 2008, a fall of about 36.5% would have become a loss of about 12.5%: 10% down to the strike, plus 2.5% for the put. That assumes your portfolio moves like the index, which your own mix of stocks may not.

The premium adds up. At 2.5% a year, 10 years of puts with no crash leave you about 22.6% behind where you would otherwise be. Shorter puts look cheaper, but you have to buy 4 of them a year: 4 three-month puts at 95 cost about 6.4% a year in this model, against 4.0% for 1 one-year put.

There is a way to cut the premium. You can sell someone else the right to your gains above a level, and use what they pay to buy the put. That is called a collar.

Collars answer the Reddit question directly. You can protect the downside without capping the upside, but then you pay a premium. To skip the premium, you give up some upside instead.

Whichever hedge you choose, it works best on top of positions that were sized sensibly in the first place. Our free 15-Minute Swing Trader’s Checklist sets your stop and size before every trade. Get the free checklist →

Hedge 4: What about inverse funds and short selling?

An inverse fund aims to rise when an index falls. Short selling does the same with a single stock or index: you sell first and buy back later, hoping lower.

Both look like a clean offset. Both carry costs that are easy to miss.

Inverse funds reset every day. The SEC’s investor bulletin on leveraged and inverse ETFs explains that most of them “reset” daily. Over longer periods, their results can differ a long way from the multiple they advertise.

Here is a 2-day example. An index falls 10% to 90, then rises 11.1% back to 100. A fund aiming for −1 times each day’s move rises 10% on day 1 and falls 11.1% on day 2. The index is back where it started, and the fund is down 2.2%.

The SEC gives a real case. “Over four months, a particular index gained 2 percent.” A fund seeking twice the inverse of that index’s daily return “fell by 25 percent”. The bulletin warns that these funds “may potentially expose investors to significant and sudden losses.”

Short positions carry open-ended risk. A stock you own can fall by at most 100%. A stock you are short can rise without limit. You also pay a fee to borrow the shares you sold for as long as you stay short, and your broker can ask for more margin if the price moves against you. How Much Leverage Should You Use? covers how that margin works.

The price tag: a slow decay while you wait, and losses if the market rises or drifts sideways in the meantime. An offset that is early costs money every day it is early.

The Hedge Price Tag: which cost would you rather pay?

[INFOGRAPHIC: The Hedge Price Tag, 4 cards for cash, bonds, puts and inverse or short, each showing how it protects, what it costs and when it fails]

Before any of these 4, there is the hedge you already control: how big each position is. A portfolio where no single holding can do serious damage needs less hedging to begin with. How Much of Your Portfolio Can Sit in One Stock? walks through that test.

Every hedge sends you a bill. The only choice is whether you would rather pay a small one every year, or a large one in the year you did not hedge.

Hedging FAQ

What is the cheapest way to hedge a portfolio?

No hedge is free, so it depends on when you would rather pay. Cash has no upfront cost and you pay in smaller gains. A put has an upfront cost and leaves your gains alone.

Can I protect my downside without limiting my upside?

Yes, with a put option, but you pay a premium for it. To avoid the premium, you give up some upside instead, which is what a collar does.

Should I hedge my portfolio right now?

That depends on your own portfolio, goals and costs, and a general article cannot decide it for you. What the numbers above do show is that put protection costs more once fear is already high.

Are inverse ETFs a good long-term hedge?

They are built for a single day. The SEC warns that over periods longer than one day their results “can differ significantly” from the daily target, so check that before holding one for weeks.

Does a stop-loss count as a hedge?

It limits the loss on one position, but it is not a hedge in this sense. In a fast crash, prices can gap past a stop, and it does nothing for the rest of the portfolio.

Go deeper

This post sits under our guide to money and risk management. For the options side, see our options trading guide, and for the bigger picture, our guide to building an investment portfolio. If you would like the routine that fixes your stop and size before every trade, the free 15-Minute Swing Trader’s Checklist is the place to start. Enter your email and we’ll send it over:

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About the author. Spencer Li is the founder of Synapse Trading and a Certified Financial Technician (CFTe). His trade log is public: every trade since April 2024, dated, losses left in.

Educational content only, not personalised financial advice. Trading carries risk, including loss of capital. Past performance is not indicative of future results. Synapse Trading is not licensed or regulated by MAS.

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