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Journal Article

Demand-Based Option Pricing

Index and equity options are notoriously difficult to price.

Perspective

Please Stop Talking About the VIX So Much

It has become quite commonplace to note that the VIX (the CBOE Volatility Index) is currently very low and to worry about it. But Cliff tends to think there's less to worry about than most.

Working Paper

Causes and Consequences of Margin Levels in Futures Markets

Using a Freedom of Information Act request, we obtained a data set on margin requirements for 16 commodity futures contracts, and used it to explore how margins are set and to test the existing theories on the implications of changing margin levels.

Trade Publication

Ahead of the Curve: Time to Embrace Downside Risk

Buying equity put options to reduce a portfolio’s downside risk exposure is so attractive that the high cost of doing so all but offsets the benefit, the authors contend.

Working Paper

Which Index Options Should You Sell?

We study return and risk properties of equity-hedged options across the S&P 500 option surface. We evaluate returns by estimating alpha to the S&P 500 and quantify risk using return volatility, losses under stress tests, and conditional value at risk.

Working Paper

Being Right is Not Enough: Buying Options to Bet on Higher Realized Volatility

Should investors who buy options expect to profit when realized volatility increases? If so, under what conditions? To answer these questions, we analyzed the relationship between long volatility performance (buying options) and contemporaneous changes in volatility.

Journal Article

Pathetic Protection: The Elusive Benefits of Protective Puts

Conventional wisdom is that put options are effective drawdown protection tools.

Working Paper

Early Option Exercise: Never Say Never

A classic rule in financial economics: Never exercise a call option and never convert a convertible bond, except just before expiration or dividend payments. This paper shows how this rule breaks down when financial frictions are introduced.

Journal Article

Covering the World: Global Evidence on Covered Calls

Covered call strategies may be decomposed, using a risk and performance attribution methodology, into three components: equity exposure, short volatility exposure, and equity timing. This paper applies that attribution methodology to covered calls on 11 global indexes.

Working Paper

Credit Implied Volatility

This paper introduces the concept of a credit implied volatility surface. The credit implied volatility (CIV) can be interpretable as risk-neutral asset volatility of the underlying firm—the slope of the CIV term structure is negative in downturns and positive during expansions.