Our Indexes

The world's leading
independent volatility indexes.

Five precision-engineered indexes that strip away the distortions of legacy vol measures — giving you a clean, real-time read on what options are actually pricing.

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VolDex®
A better way to measure option volatility
VolDex® focuses on the options that matter most—at-the-money (ATM) options with near-term expirations—giving a cleaner, more accurate view of implied volatility.

By isolating these highly liquid and actively traded contracts, VolDex avoids the distortion caused by less relevant, far out-of-the-money options. The result is a more precise snapshot of market expectations for price movement and investor sentiment—without the noise.
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CallDex®
A clearer signal of bullish sentiment & expected volatility
CallDex® tracks the cost of out-of-the-money call options to gauge market sentiment for the next 30 days. It uses call options that are one standard deviation out-of-the-money to measure what investors are expecting in terms of both volatility and potential price direction.

Higher CallDex values generally suggest traders are anticipating bigger moves or a possible market rally. Lower values indicate a calmer outlook or reduced interest in upside exposure.
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PutDex®
Focused on downside risk pricing
PutDex® delivers a clear, strike-specific measure of implied volatility by concentrating on one key data point: the normalized cost of a 30-day, one standard deviation out-of-the-money (OTM) SPY put option.

This approach isolates the segment of the options market most directly associated with downside protection, removing the noise from less relevant strike prices. The result precisely indicates market sentiment around tail risk, hedging activity, and bearish positioning.

By zeroing in on these put options—widely used by institutional investors to protect against market declines—PutDex offers valuable insight into how much investors are willing to pay to insure against losses over the next month.
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RiskDex®
A Clear Signal of Expected Market Direction
RiskDex® measures investor sentiment by comparing the normalized cost of 30-day, one standard deviation out-of-the-money (OTM) SPY put and call options. This simple ratio reveals whether the market is more focused on downside protection or upside opportunity — offering a direct view of expected equity direction over the next month.

Unlike traditional volatility indexes, which reflect overall price movement, RiskDex highlights directional bias. A rising RiskDex indicates OTM put prices are increasing at a faster rate than OTM call prices and suggests growing concerns about potential declines; a lower reading signals confidence or complacency.

This makes RiskDex a valuable tool for traders and risk managers seeking clarity on where the market thinks it's headed—not just how volatile it might be.
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TailDex®
A smarter signal for downside risk & tail hedging demand
TailDex® measures the price of deep out-of-the-money put options to assess bearish sentiment and demand for tail risk protection over the next 30 days. By focusing on puts that are three standard deviations OTM, it reflects how concerned traders are about a major downside move, often called a 'tail event'.

Higher TailDex values suggest rising demand for crash protection or increased fear of large selloffs. Lower values imply a calmer market tone and less urgency to hedge against tail risk.
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The long strangle

Learning CenterStrategy Library › The long strangle

The long strangle

IntermediateFree6 min read

A long strangle is a cheaper version of the straddle. You still buy a call and a put to bet on a big move in either direction, but at out-of-the-money strikes instead of at-the-money. The lower cost buys you a smaller loss if nothing happens — at the price of needing an even larger move to profit.

Long strangle — long the $105 call and $95 put for $3 each, $6 total. Cheaper than a straddle, but needs a move beyond $89 or $111.

7580859095100105110115120125−15−10−505101520BE 89BE 111Underlying price at expirationProfit / loss ($ per share)

How it is built

Two long out-of-the-money options: a call above and a put below. Stock at $100: buy the $105 call for $3 and the $95 put for $3, total debit $6 — less than the straddle’s $10. Your breakevens widen to $89 and $111, because you must overcome both the OTM distance and the premium. Max loss is the $6, incurred anywhere between $95 and $105 at expiration.

Outlook Expecting a very large move, direction unknown
Max profit Unlimited on the upside; very large on the downside
Max loss Total premium = $6/share, between $95 and $105
Breakeven $89 (put strike − premium) and $111 (call strike + premium)
Time decay (theta) Works against you — long two options
Straddle vs. strangle

Same $100 stock, same volatility view. The straddle costs $10 and profits beyond $90/$110. The strangle costs $6 and profits beyond $89/$111. The strangle risks less in dollars if the stock stalls, but its wider breakevens mean it needs a bigger move to pay. Choose the straddle when you want the tightest breakevens and the strangle when you want a cheaper bet and expect a truly large move. Both live or die on the same implied-versus-realized volatility question.

When to use it

Use a long strangle when you expect an outsized move and want to spend less than a straddle to bet on it. The same discipline applies: it only wins if realized movement beats the implied volatility baked into the premiums. A volatility gauge that shows implied levels are low relative to the move you anticipate is what tilts the odds in your favor.

Common pitfalls

Choosing strikes too far out. A very cheap strangle needs a huge move to pay; most expire worthless. Cheap is not the same as good value.

Holding through the vol crush. After the catalyst, implied volatility deflates and both legs sag — exit around the event, not long after.

What to do with this

The strangle is the budget long-volatility trade: cheaper, but hungrier for movement. The final two lessons take the opposite side — selling a range and collecting premium when you expect quiet.

Flip to the other side of volatility: the iron condor sells a range and collects premium.

Next lesson · continue the courseOn to the iron condor →