Investing term
What is Creation/redemption?
The mechanism that keeps ETF prices close to NAV. Authorized participants swap baskets of underlying stocks for ETF shares (or vice versa).
Creation/redemption is the behind-the-scenes mechanism that keeps an ETF's price glued to the value of its holdings. Large institutions called authorised participants can swap a basket of the underlying stocks for new ETF shares, or hand back ETF shares to receive the underlying stocks.
This creates an arbitrage. If the ETF drifts above the value of its holdings, participants create new shares and sell them, nudging the price down; if it drifts below, they buy cheap shares and redeem them for the more valuable basket, pushing the price up. That constant, profit-seeking pressure keeps an ETF's market price tracking its net asset value far more tightly than a mutual fund's structure ever could.
When an ETF drifts from the value of its holdings, big institutions create or redeem shares to profit from the gap — pushing the price back to NAV. It's why you can trust an ETF's price.
For example
If an ETF trades slightly above its holdings' value, an authorised participant creates new shares and sells them, nudging the price back down to fair value.
Learn it by doing
That's Creation/redemption in theory — it clicks when you use it. Practise it hands-on in a free, interactive lesson (Stage 6, Index Funds, ETFs & Mutual Funds).
Try the free lesson →Why it matters to you
Creation/redemption matters because it's the reason you can trust an ETF's price. Without it, an ETF could drift far from the worth of what it holds, like a stock trading on sentiment. The mechanism is what lets ETFs combine live, all-day trading with prices that stay close to fair value — and understanding it explains why big, liquid ETFs almost never stray from NAV, while thin ones occasionally can when the arbitrage breaks down.
⚠ Assuming it always works perfectly
The arbitrage that keeps an ETF near fair value depends on authorised participants being able to trade the underlying holdings smoothly. In a severe market panic — or for ETFs holding illiquid assets — that process can strain, and the ETF's price can gap away from NAV. The mechanism is powerful but not infallible under stress.