Strategy is what you decide in calm conditions. Execution is what happens under stress. A written policy is the bridge. Pension funds, endowments, and family offices all have one. Almost no retail investors do. The document is called an investment policy statement, or IPS, and it is the most important piece of paper in any disciplined investor’s process. It connects how an investor thinks about money in calm conditions to what they actually do with it across every market environment that follows. Without it, the two operate as separate systems, and the second one wins. With it, the first one stays in charge. This article is about why the document exists, what it should contain, and how to write a usable one for your own portfolio. Why the document exists The case for an IPS rests on two related observations about how investors make decisions. The first is about altitude.…