How to prepare your portfolio for an AI crash

“What should I do if there's a AI crash?” a friend asked me recently. It is a very sensible question – we don't know there will be an AI crash, but having a clear plan to follow when you start to worry is better than waiting and panicking. However, it's also a very difficult question, because the AI theme is such a huge part of the market: tech is over 35% of the MSCI World index (once you allow for firms such as Amazon and Alphabet assigned to non-tech sectors), while the tril