ETF Premium / Discount

ETF premium and discount measures the gap between a fund's secondary-market price and its net asset value. In theory the creation/redemption arbitrage compresses this to near zero, so a persistent premium or discount is itself evidence that arbitrage is impaired.

The key is understanding the cause of the gap rather than its size. Grayscale's GBTC traded at a deep, persistent discount through 2021-22 (approaching -50% at one point) because the trust structure then permitted no redemptions, leaving arbitrage one-directional — a sharp contrast with how fast the discount converged after conversion to an ETF, and a textbook demonstration of arbitrage efficacy. For a normally functioning spot ETF, small intraday deviations are ordinary market-making friction; sustained gaps beyond a percent usually point to constrained creations, illiquid underlying, or custody problems.

ETF and institutional metrics track regulated fund flows. Daily prints are extremely noisy and a single day's number carries almost no predictive value — read weekly and cumulative trends instead.

The live chart for this metric is still being wired up. Bitcoin and Ethereum spot ETF flows, AUM and market share are already fully live.