A couple days ago, Art Samberg passed away. Art was one of the most successful and genuine human beings I knew. He came from nothing, got into MIT, and went on to build one of the world's great investment firms. Art was one of the first...

The markets are in freefall and Sequoia wrote a memo last week. It was insightful, sounded the alarm bell, and is a valuable guide for entrepreneurs thinking about how to act, especially for those who have never been through an analogous situation. I sent it...