With a little bit of index arbitrage thrown in there for good measure

Next week is triple-witching expiry. I know, I know - it’s now called quad-witching, but what can I say? To me, it will always be triple-witching.

A lot of market pundits talk about this mysterious day, but I get the sense many of them don’t really understand what’s going on. So I thought it would be helpful to explain how stock index arbitrage work…

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