Investing term
What is Investment Policy Statement (IPS)?
A written one-page document stating your time horizon, target allocation, position limits, rebalancing rule, and crash behaviour.
An Investment Policy Statement (IPS) is a short written document setting out your time horizon, target allocation, position limits, rebalancing rule, and — crucially — how you'll behave in a crash. It's your personal investing constitution: the rules you set for yourself, in writing, while calm and rational.
Its power is that it exists before you need it. When markets crash, when a hot opportunity beckons, when a headline screams panic, the IPS is the document you return to — a record of the decisions your clear-headed self made, to govern your emotional self. It doesn't need to be long; a single page covering your goals, your allocation, your limits, your rebalancing and buy/sell rules, and your pre-committed behaviour in a downturn is enough. The act of writing it forces clarity, and having it turns investing from a stream of ad-hoc emotional decisions into following a plan you can point to when it matters most.
Written while calm, an Investment Policy Statement records the decisions your clear-headed self made to govern your emotional self — the document you return to in a crash, a hot tip, or a scary headline.
For example
Your one-page IPS states: '30-year horizon, 80/20 target, no single stock over 5%, rebalance annually, and I will not sell in a crash.' When the market plunges, you read it — and hold.
Learn it by doing
That's Investment Policy Statement (IPS) in theory — it clicks when you use it. Practise it hands-on in a free, interactive lesson (Stage 20, The Investor's Playbook).
Try the free lesson →Why it matters to you
An IPS matters because it's the master document that makes every other discipline — target allocation, rebalancing rules, buy and sell rules, do-nothing rules — cohere into one plan you can actually follow. Written while calm, it becomes the anchor that governs your emotional self in the moments that matter, and the reference point that resists panic, FOMO, and drift. For a serious long-term investor, putting the plan in writing is one of the highest-value, lowest-effort steps there is.
⚠ Having a plan only in your head
An unwritten plan is easily rewritten by emotion — in a crash, your 'plan' quietly becomes whatever fear suggests, and you never notice it changed. The act of writing an IPS is what gives it force: it's a fixed record of your calm decisions to check against your panicked impulses. A plan that lives only in your head offers no defence when you most need one.