Volatility skew is the difference in implied volatility (IV) between out-of-the-money (OTM) options. A positive skew exists when the IV of OTM puts is higher than the IV of OTM calls, while a negative skew exists when the IV of OTM calls is higher than the IV of OTM puts.

There are a few reasons why a positive skew exists more often than a negative skew. One reason is that investors are generally more worried about downside risk than upside potential. This is reflected in the higher IV of OTM puts relative to OTM calls.

Another reason for a positive skew is the fact that OTM puts are more expensive than OTM calls on a relative basis. This is due to the higher probability of the underlying asset finishing below the strike price of a put option relative to the strike price of a call option.

The term "skew" is often used to describe the shape of the IV curve. A positive skew exists when the IV curve is skewed to the upside, while a negative skew exists when the IV curve is skewed to the downside.

Why are OTM options more volatile? An OTM option is one whose strike price is out of the money, i.e. the strike price is higher than the current price of the underlying asset. An OTM option is more volatile because it has more time value. Time value is the amount by which the option's premium exceeds its intrinsic value. Intrinsic value is the difference between the strike price and the underlying asset's price. An OTM option's time value is higher because the option is more likely to expire in the money.

### What does it mean to be long skew?

Simply put, being long skew means having more downside risk than upside risk. In other words, the potential losses are greater than the potential gains. This is often the case when investors are bearish on the market, or when they believe that a stock is overvalued and due for a correction.

##### How do you read vol skew?

Vol skew is the difference in implied volatility (IV) between different strike prices. A positive skew means that IV is higher for lower strike prices, while a negative skew means that IV is higher for higher strike prices.

There are a few different ways to read vol skew. One way is to look at the shape of the skew curve. A positively skewed curve will have a shallower slope for lower strike prices and a steeper slope for higher strike prices. A negatively skewed curve will have a shallower slope for higher strike prices and a steeper slope for lower strike prices.

Another way to read vol skew is to look at the difference in IV between different strike prices. For example, if the IV for a $50 strike price call is 10% and the IV for a $60 strike price call is 12%, then the skew is said to be positive 2%. This means that the IV for lower strike prices is higher than the IV for higher strike prices.

Vol skew can be used to help make trading decisions. For example, if you are considering buying a call option, you may want to buy a call with a lower strike price if the skew is positive. This is because the lower strike price call will have a higher IV, which means it will have a higher chance of being in-the-money at expiration.

### What is a 25 delta risk reversal?

A 25 delta risk reversal is a type of options trade that involves buying and selling options with different strike prices, but with the same expiration date. The trade is structured so that the trader's net delta exposure is zero.

The trade is often used as a way to speculate on the direction of the underlying asset, without having to take on the risk of outright ownership. It can also be used as a hedging tool, to offset the risk of other positions in the trader's portfolio.

The 25 delta refers to the amount of net delta exposure the trade has. Delta is a measure of the rate of change of an option's price with respect to changes in the price of the underlying asset. A 25 delta risk reversal means that the trader's net delta exposure is zero.

This type of trade can be risky, because the trader is effectively gambling on the direction of the underlying asset. If the asset moves in the wrong direction, the trader can lose money. What does implied volatility skew measure? Implied volatility skew is the difference in implied volatility between out-of-the-money options and at-the-money options. A positive skew means that out-of-the-money options have higher implied volatilities than at-the-money options, while a negative skew means the opposite.

Skew is important because it can give clues about market expectations. A positive skew, for example, may indicate that the market is expecting a large move in the underlying asset, while a negative skew may indicate the opposite.

There are a number of factors that can influence skew, including the underlying asset's price, the time to expiration, and interest rates.