In this article, we’ll use simulation and simple visualisations to build intuition around how different variables drive the price of an option. Building this intuition is important because it helps you react quickly and make decisions without relying on complex pricing models. Let’s get to it. The value of a call option at expiration A …
This post assumes basic knowledge of Options and Mathematical Expectation. Most of the features that you observe about options are simply due to the fact that they are expiring bets. And the features we observe in option pricing are observed in any other expiring bet. The complicated maths and terminology that surround options can make it …
Read the previous parts of this 101 series on options: There are 2 good reasons to buy put options: Because you think they are cheap Because you want downside protection. You want to use the skewed payoff profile to protect a portfolio against large downside moves without capping your upside too much. The first requires …
A few years ago, I got deep into the idea of constructing a long/short equity options portfolio based on the kind of simple factor sorts that had been so successful in quant equity. My original intention was to set up an index and license it to fund managers. Of course, there are many reasons why …
If you trade liquid stocks or futures contracts, the first thing you will notice about equity options trading is that the contracts are illiquid and the bid/ask spread is wide. This sucks, but it makes perfect sense. There is only one AAPL stock to trade, but there are a ton of different options contracts trading …
Here’s a thing that I suspect will make money, but that I haven’t yet tested (for reasons that I will explain shortly): Every day, at the start of the trading day, get the SPX straddle price and convert it to an expected SPX price move. Then at the end of the trading day, take the …
Let’s talk about carry trades. First, what exactly is a carry trade? A carry trade is a trade that pays you to hold it. A position where, if nothing changes except the passing of time, you expect to make money. Let’s go through some examples. FX carry The classic example is the FX carry trade, …
I’ve previously discussed the Volatility Risk Premium (VRP) and how it differs from the Equity Risk Premium (ERP). Probably the most interesting difference, from the perspective of the trader, is that the VRP may be somewhat amenable to timing – more than the ERP at any rate. In this article, I’ll use some of the …
You’ve probably noticed that there’s a US election on the horizon. This is an event of known uncertainty: a “known unknown” in the now immortal language of Donald Rumsfeld. In trading, we sometimes observe marginal pricing inefficiencies around these “known unknowns”. For example, ahead of stock earnings announcements or significant economic or policy announcements, we tend …
This is a review of Positional Option Trading by Euan Sinclair. Trading books set a low bar for the reviewer. 99% are full of facile feel-good advice (don’t fight the trend, always use a protective stop). The 1% that are useful tend to either be dry technical treatments (quants who don’t trade), or sporadically helpful …
