Smile, it’s Volga!

Armed with the Hardy Decomposition for option prices, it now becomes much easier to understand why the smile exists. To be clear, options trader might use the smile to manage supply & demand, but here we discuss the mathematical basis for smile - which is important if you want to understand how to generate smile … Continue reading Smile, it’s Volga!

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Calculating option prices in your head

We all know that option prices are calculated with the Black-Scholes formula, using a volatility, time-to-maturity, strike and forward. Typically you just chuck them all into your computer and let it spit out the number. Trouble with this is how do you get an intuition for prices, especially when you are looking at options trades … Continue reading Calculating option prices in your head