The culprit is technically rising interest rates, but you could argue it began when founders and investors started to see the downside of swinging for the power law. The first venture funds formed as a way for savvy investors to help innovators create fundamental technologies like transistors, which required huge outlays of time and treasure before they could produce value. But in the past few years, causality inverted: Start-ups and entire markets were manufactured from whole cloth to meet the demand of overcapitalized venture funds searching for a home run.