BIOY bid-ask spread and liquidity

GraniteShares YieldBOOST Biotech ETF
IncomeGraniteShares$2m net assets1.07% fee
Share

As of Oct 22, 2026, BIOY closed +0.10% from its NAV, and on 95% of the 8 days to then it was within ±0.20%.

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Ask IQ about BIOY bid-ask spread and liquidity

Answers cite the figures on this page.

OverviewDividendsTradingFlowsCompare

IQ Liquidity Score

2 of 6 measured · Oct 22, 2026
·
Not scored
0 · Hard to trade100 · Trades like a giant

The IQ Liquidity Score: a fixed 0 to 100 scale of trading conditions, the same anchors for every fund; 100 is the easiest to trade. It measures how cheaply and reliably the fund trades, not whether to own it. Method →

One dealer
Cost to trade
Not measured · the issuer's 30-day median spread is not read for this fund
·
Capacity
Holdings can absorb $372m a day, Oct 22, 2026
85.7
Price fidelity
Not measured · 8 days of closing premium are held, under the 20 needed
·
Primary market
1 active dealer of 1; largest 100% of creations and redemptions, N-CEN to Jun 30, 2026
25.0
Bad-day behaviour
Not measured · 0 of the 10 worst days and 8 other days are held, under the 5 and 60 needed
·
Depth
Not measured · needs trade and quote data (Phase 2)
·

Premium or discount to value

Daily, 8 days to Oct 22, 2026 · the ±1% band marked
BIOY premium or discount to NAV, 8 days+1%0−1%Sep 10, 2026Oct 22, 2026
Latest close, Oct 22
+0.10%
95% of days within
±0.20%
Days more than 1% from NAV
0 of 8
Widest
−0.20%, Oct 16, 2026

Close against the NAV its issuer struck the same day, from the issuer. Source: ETFIQ.

Capacity

What the holdings can absorb a day, at 10% of each one’s volume
Holdings can absorb
$372m

BIOY’s holdings can absorb $372m a day, measured on the holdings of XBI, its benchmark, since its own book is not a stock book measured in full, as of Oct 22, 2026. A $1m order is 0.27% of a day’s capacity.

The holding that sets the limit: BIOHAVEN LTD (BHVN), 0.55% of the fund, $20m a day traded, the median of 20 days to Oct 22, 2026. Capacity is the least of the holding-level ratios over the holdings making up 95% of the weight.

Dealers

Authorized participants · N-CEN, the year to Jun 30, 2026
Active dealers
1
of 1 authorized
Largest
100%
of creations and redemptions
One dealer
Yes
1 active

1 of 1 authorized participants created or redeemed BIOY shares in the year to Jun 30, 2026. From the fund’s Form N-CEN, filed Sep 11, 2026.

The active authorized participants, largest first, by share of the dollars created and redeemed: Jane Street Capital, LLC (100.0%).

How to trade BIOY

To buy or to sell, up to $100,000
When
ETF spreads are usually widest in the first minutes after the open and the last before the close.
Size
Up to $4m is 1% of what its holdings can absorb in a day, for a buy or a sell.
Watch
The premium. On 95% of days it is within ±0.20%; beyond that a buyer pays more, and a seller gets less, than the holdings are worth.
Phase 2 · drawn now, filled when trade data arrives
Spread through the dayComing with trade data

Median spread by half hour, 30 days.

Buyers against sellersComing with trade data

Share of volume at the ask against at the bid.

Retail flow, estimatedComing with trade data

Sub-penny prints as a share of volume.

Large tradesComing with trade data

Prints above $500k, count and share.

Closing auctionComing with trade data

Share of the day’s volume at the close.

Questions people ask

Does BIOY trade at a premium or discount to NAV?

It closed +0.10% from its NAV on Oct 22, 2026. On 95% of the 8 days to then it was within ±0.20%, and it closed more than 1% from NAV on 0 of them.

Who is the AP for BIOY?

BIOY’s latest Form N-CEN, for the period ending Jun 30, 2026, lists 1 authorized participant (APs), and 1 created or redeemed shares. The only active AP was Jane Street Capital, LLC.

Who is the LMM for BIOY?

BIOY’s lead market maker (LMM) on Nasdaq is Jane Street Capital, LLC. Lead market maker per Nasdaq, as of Oct 23, 2026.
Sources and dates
Premium to NAVETFIQ, close against the issuer’s NAV · Sep 10, 2026 to Oct 22, 2026
CapacityETFIQ, each holding’s 20-day median dollar volume · to Oct 22, 2026
DealersForm N-CEN · the year to Jun 30, 2026
Where to next
ETF trading costs and liquidity→Cost-to-trade checker→Why low volume does not mean illiquidguide →Limit orders vs market orders for ETFsguide →How the IQ Liquidity Score is builtmethod →BIOY fund page→
Cite this pageCitation, APA and Markdown

ETFIQ, BIOY trading: cost, capacity, premium and dealers, data as of Oct 22, 2026. https://etfiq.com/funds/bioy/trading/

Open data →

The score measures trading conditions, not the fund. ETFIQ makes no recommendations.