gamma is used to measure the rate of change in an options delta as the underlying security (stock, etf, index) moves. In a positional context, long gamma means your option position is such that if the stock rallies (or declines), your share equivalent position (also known as delta) gets you longer (or shorter).
a long gamma position is any option position with positive gamma exposure, while a short gamma position is any option position with negative gamma exposure. More specifically a position with positive gamma (long gamma) indicates the positions delta will increase when the stock price rises, and decrease when the stock price falls.
long gamma (also called positive gamma) indicates that the trades delta will increase as the stock rises and decreases as the stock falls. Long gamma traders want the stock to continue trending in the same direction. Short gamma (also called negative gamma) indicates that the trades delta will decrease as the stock rises and increases as the stock falls.
Option gamma indicates how an option positions delta will change as the stock price changes.
the longer time to expiry options has lower gamma near the at the money strike. Critical concept 3 the less time to expire your options contract has, the higher the gamma. Therefore, the larger your profit or losses will be for a 1 move of the underlying stock.
gamma hedging is a trading strategy that tries to maintain a constant delta in an options position, often one that is delta-neutral, as the underlying asset changes price.
Long gamma means you are going to get more long the underlying as the price of the underlying increases. Gamma is a convexity measure, so it is also how quickly your delta is changing.
that means if the stock goes up 1, the delta will increase by the gamma value. In other words, if the stock goes up 1, the delta will increase to 0. On the other hand, lets say the stock goes down by 1, then the delta will drop to 0. Keep in mind, when the stock price changes, so will the gamma.
there are two sides to gamma hedging long gamma or short gamma. The example i gave earlier is an example of long gamma, counter to that, short gamma is just the exact opposite.
strategies that buy when markets are rising and sell when they are falling are called short gamma, and the opposite are called long gamma. Levered and inverse etps, including levered and inverse vix etps, are an example of a short gamma product.
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