Explainers
NAV, premiums and discounts explained
How a Bitcoin ETF strikes its net asset value once a day while bitcoin trades non-stop, why the share price drifts from it, and what a premium or discount is actually telling you.
A Bitcoin ETF has two prices at all times. One is the price on your screen, set by whoever is buying and selling right now. The other is net asset value — the accountants' number, struck once a day, saying what the bitcoin behind each share is actually worth.
They are almost never identical, and that is not a defect. Understanding why they differ, and how much difference should worry you, is the difference between reading a fund page properly and being spooked by a number that means nothing.
What NAV is, precisely
Net asset value per share is the total value of the trust's bitcoin, less accrued liabilities such as the sponsor fee, divided by the number of shares outstanding. It is a bookkeeping figure struck at a specific moment each business day.
For the iShares Bitcoin Trust on 2 September 2026, NAV was $43.7352 per share, with the fund holding roughly $60.0 billion in net assets. That four-decimal precision is the giveaway that this is an accounting output, not a market quote.
How it gets calculated when the asset never closes
Bitcoin has no closing bell and no single official price. It trades continuously across dozens of venues, each with its own book and its own last trade. So a trust cannot simply "use the closing price" — it has to define one.
Each fund specifies a reference rate in its prospectus: typically a benchmark index that samples prices across several major exchanges over a defined window, at a set time — commonly 4:00pm New York time to align with the US equity close. The methodology handles outliers and venue weighting, and it is published, so anyone can audit the input.
Two consequences follow. First, two funds can report marginally different NAVs on the same day if they use different reference rates. Second, everything bitcoin does between the strike and the next one exists only in the share price, not in NAV.
Intraday indicative value
Because a once-daily NAV is not much use mid-session, exchanges disseminate an intraday indicative
value — often published under a ticker with a suffix such as .IV — estimating the
per-share value of the holdings in near real time, usually every fifteen seconds.
It is an estimate, not a valuation, and it is not what creations settle against. Its practical use is as a sanity check: if the share price is trading noticeably away from the indicative value, you are probably looking at a thin book or a fast market, and a limit order matters more than usual.
Premiums and discounts, and what size is normal
| Size | What it usually means | What to do |
|---|---|---|
| Under 0.10% | Normal intraday noise. Timing differences between NAV strike and market close. | Nothing. Smaller than the spread you already pay. |
| 0.10% – 0.50% | A fast-moving market, a thin fund, or trading near the open or close. | Use a limit order and consider waiting for mid-session. |
| 0.50% – 2% | Genuinely strained liquidity, or an unusual event in the underlying market. | Do not use a market order. Reconsider whether the fund is liquid enough for you. |
| Sustained double digits | The redemption mechanism is blocked or absent — a closed-end structure, not a working ETP. | Understand exactly why before buying. This was GBTC pre-2024. |
For the large US spot funds, the first row covers nearly all observations. The bottom row should not occur in a functioning ETP.
The GBTC discount: what happens with no redemption
The Grayscale Bitcoin Trust is the reference case for why this matters. Before its January 2024 conversion, GBTC could issue shares but not retire them. There was no redemption, so there was no arbitrage available to close a gap.
When demand fell, the discount widened past 40%. Holders owned a claim on bitcoin worth substantially more than their shares fetched, and there was no mechanism to capture the difference — you could only sell into the same depressed market. That is not a mispricing an arbitrageur forgot about; it is the correct price of a claim you cannot redeem.
Conversion restored redemption and the discount collapsed within weeks. The mechanism is described in creation and redemption; the profit calculation in arbitrage.
Spot markets have no NAV, no strike time and no premium
Buying bitcoin directly means the price you see is the price of the asset — no once-daily valuation, no reference rate, no weekend gap. CEX.IO is registered with FinCEN as a money services business, licensed for money transmission across US states, and authorised by the Gibraltar Financial Services Commission.
How to check NAV yourself, in two minutes
- Go to the issuer's fund page
Not a data aggregator. Issuers publish NAV per share with an explicit as-of date, and it is the authoritative figure.
- Note the as-of date
NAV is struck once per business day and published after the close. A Tuesday morning page usually shows Monday's NAV.
- Compare against the current market price
Divide the difference by NAV for the premium or discount in percentage terms.
- Check the published premium history
Most issuers show a table or chart of daily premium and discount. One outlier day is noise; a persistent pattern is information about liquidity.
What this means for your order
For the largest funds, honestly, very little. IBIT's premium and discount are typically a basis point or two — smaller than the roughly 0.02% spread you cross anyway. Timing your entry around NAV would be optimising a rounding error.
It matters in three situations. In a small fund, a persistent premium signals that market makers are demanding compensation for thin liquidity — a cost you pay on both sides. Around the open and close, gaps widen as market makers reprice; the middle of the session is calmer. And after a weekend move in bitcoin, Monday's opening print can sit well away from Friday's NAV simply because the fund was shut while the asset was not. None of that argues against buying — it argues for a limit order, which is the subject of limit orders on crypto ETFs.
Our take from the desk
NAV is more useful as a diagnostic than as a trading input. We rarely look at it to decide when to buy, and often look at it to decide whether a fund is worth using at all. A fund whose premium history is a tight band around zero has functioning arbitrage and real market makers. A fund bouncing between plus and minus half a percent is telling you its liquidity is thin, whatever its fee table says.