volatility as an asset class

In short

I once watched a neighbor check his brokerage app six times before lunch, and by supper he looked worn out. If that sounds like you, know that the swing in prices has a name, and the name is volatility. It can be measured, and since the early 1990s the Chicago Board Options Exchange has published a number called the VIX that tries to measure what traders expect. You cannot buy that number directly, so people trade futures, options, and funds that follow it. Those products can behave very differently from the number itself. They also carry costs that eat away at a position over time. Read the fund's prospectus and the exchange's own rulebook before putting a dollar into any of them.

The whole of it

What it is

A friend of mine farms a hundred acres, and he says the worry is never the rain. It is not knowing when the rain will come. Volatility is a lot like that. It describes how far and how fast a price moves up and down. A stock that goes from $50 to $51 to $50 is calm. A stock that goes from $50 to $58 to $44 is jumpy. The jumpiness is the thing.

Some people say volatility is an asset class. The label is a stretch, and a fair person can disagree. A true asset class, like a share of a company, pays you something for holding it. Volatility pays nothing on its own. It is a measurement, like a thermometer reading. You cannot own the temperature. What you can own are contracts whose prices lean on that reading. Traders still talk about it as its own category because those contracts move on their own rhythm, often apart from stocks and bonds.

There are two kinds of volatility worth knowing. Realized volatility looks backward. It is how much a price actually moved over some past stretch. Implied volatility looks forward. It is what option prices say the market expects. The VIX is the best known implied measure. The Cboe Global Markets publishes it, and it is built from the prices of options on the S&P 500 index.

How it works

If you have ever bought insurance, you already understand the core idea. When people feel afraid, they pay more for protection. Options are a form of protection, and a put option gains value when a price falls. When fear rises, option prices rise. The VIX climbs with them. So the VIX tends to jump when stocks fall hard. That habit is why some investors view it as a hedge.

Here is the catch, and it is a big one. You cannot buy the VIX itself. It is a calculation, not a thing. What you can trade are VIX futures, which are contracts to settle at a future date based on where traders think the VIX will be. Exchange traded products, often called ETPs, hold those futures and sell shares to the public. The Cboe lists the futures and options on its own exchange, and the product sponsors describe their funds in documents filed with the SEC.

Now for the part that trips people up. Futures for later months usually cost more than futures for sooner months when markets are calm. A fund that holds them must keep selling the cheaper near month contract and buying the pricier next one. It sells low and buys high on a schedule, again and again. That drag is called roll cost. It works like a slow leak in a tire. Nothing seems wrong on any one day, yet the pressure drains away.

The numbers, and where to find yours

The VIX reading itself is quoted as a plain figure, not a dollar amount, so a reading of 20 does not mean $20. It is an annualized percentage, meaning it expresses the expected yearly swing in the S&P 500. The Cboe's published methodology explains how it divides that yearly figure down to a 30 day window. You can find the white paper on the Cboe website under its VIX pages.

Your own numbers live in the fund's documents. The prospectus lists the expense ratio, which is the yearly fee taken from the fund's assets. It also describes how the fund rolls its futures and what the fund aims to track. Look for the words daily objective. Many volatility funds aim to match a single day's move, not a month's or a year's. That detail matters more than almost anything else on the page.

Options on equities also have a quantity called vega. It tells you how much an option's price shifts when implied volatility moves by one percentage point. Your broker's options chain usually shows it beside each contract. The Options Clearing Corporation publishes a booklet called Characteristics and Risks of Standardized Options, and every options account holder is supposed to receive it.

A worked example

Let me tell you about a woman named Marisol, who is a nurse with a steady paycheck and a small savings account. She read that volatility rises when stocks fall, and she liked the sound of that. She put $5,000 into a fund that holds short term VIX futures.

Suppose the fund loses 3 percent a month to roll cost during a calm stretch, even when the VIX sits still. That is $5,000 times 0.03, which is $150 lost in month one. The balance is now $4,850. Month two takes 3 percent of $4,850, which is $145.50, leaving $4,704.50. Month three takes 3 percent of $4,704.50, which is $141.14, leaving $4,563.36. After three quiet months she has lost $436.64 without a single bad headline.

Now picture the same fund over twelve months of calm. Each month keeps 97 percent of the month before, so the balance is $5,000 times 0.97 raised to the twelfth power. That is $5,000 times about 0.694, which comes to about $3,470. She would be down roughly $1,530 on a year when nothing dramatic happened. These figures are my own round example, not the record of any real fund, and real roll costs shift from month to month.

Where it goes wrong

I have a soft spot for folks who try to protect themselves, because it shows they care about the people counting on them. Still, a few mistakes come up again and again.

The first is holding a daily fund for months. A product built to match a single day can drift far from the VIX over weeks. Its sponsor says so in the prospectus, and that warning is worth reading twice. The second mistake is treating the VIX as a savings plan. It has no yield and no earnings behind it. Its natural pull, because of roll cost, runs downward in quiet times.

A third trouble comes from leverage. Some funds aim for two times the daily move, or for the opposite of the daily move. Those can lose most of their value fast, and some have been shut down after sudden spikes. Fine people have been burned here. Short volatility products, which profit from calm, famously collapsed in February 2018 when the VIX surged in a single day.

Last, options carry their own risk. A seller of options can face losses larger than the cash first put in. The buyer of an option can lose the whole price paid. The broker must approve an account for options, and the approval level sets what the account holder may do.

Questions to answer before you leave this page

Do you know whether the product you are looking at tracks the VIX itself or only futures that lean on it? Have you read the prospectus section that explains the daily objective, and do you understand what it means for a holding period of months? Can you say in plain words what roll cost is and how much it might take from a quiet year? What would a loss of $1,530 on a $5,000 position mean for your month, your family, and your sleep? Is the money you are weighing money you can spare, or is it the money that keeps the lights on? Have you opened the Cboe's VIX methodology and the OCC options booklet, and did the words in them make sense to you? And if the answer to any of these is not yet, would a little more reading cost you anything at all?