I’m a hedge fund manager. Not a big fund all things considered, just a few hundred million. But I think about stuff like this for a living. Here’s why you can safely ignore this article.<p>There is always someone predicting an upcoming market crash. People like Grantham (cited in the post) have been predicting a mega crash for most of the last decade. Market crashes occur every 10-20 years but the thing is, over that 10-20 year cycle the market is always net up, so if you sit out the cycle because of worries about an upcoming crash you could easily miss out on 5-10 years of great returns.<p>The post author frequently compares flow variables (eg earnings, GDP) to stock variables (eg market cap). That’s not necessarily terrible, but the ratio is always sensitive to interest rates (because the stock variable discounts future values of the flow variable, and when rates are low the discounting has less of an effect). Market cap/earnings and market cap/GDP are high now because interest rates are low (asp because growth expectations are high, but that’s not necessarily incorrect). Before the dot com crash US interest rates were 6%, compared to 0.25% now — of course that skews the statistics.<p>Michael Burry is cited as “someone with a proven track record of predicting market crashes” but in fact he predicted exactly one crash. Well, so did John Paulson, and the ensuing decade proved that it was just luck. Mark Cuban “predicted” the dot com crash. It doesn’t mean they are geniuses, it means they got lucky once.<p>Growth in margin debt is cited as a reason to worry. But margin debt has grown because assets have grown. The S&P 500 has double since the lows of March 2020, so the fact that margin debt has doubled is not a cause for concern. As a percentage of assets, margin debt has been stable for the last decade.<p>This post is pointless fearmongering, nothing more. Of course, there will be a crash at some point. It could be in six months, a year, five years or ten years. This guy can’t predict it any better than anyone else can.