xyz:COSTequity & other · growth mode on · 20× max
Over 106 days of 20-level order-book snapshots, xyz:COST quoted a median spread of 7.04 bps in US regular hours with $124k resting within 25 bps of mid. A $25k market order paid about 5.58 bps in regular hours and 41.86 bps on weekends, when depth within 25 bps fell to $10k. Taker fee is 0.90 bps with growth mode on; funding averaged +1.97% annualised over the last 30 days.
by sessionNew York time · medians over 106 days
| session | snaps | spread | p90 | top | depth ±10 | depth ±25 | depth ±50 | $5k | $25k | $100k | $100k fills | $250k fills |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| US regular 9:30–16:00 | 4,821 | 7.04 | 13.71 | $124k | 5.58 | 16.04 | 42% | 4% | ||||
| US extended 4–9:30, 16–20 | 7,073 | 9.26 | 18.50 | $49k | 15.91 | 34.58 | 17% | 1% | ||||
| Overnight 20–4 | 4,865 | 9.24 | 23.05 | $39k | 16.93 | 42.41 | 14% | 1% | ||||
| Weekend / holiday | 9,119 | 14.70 | 26.16 | $10k | 41.86 | 49.84 | 3% | 0% |
bps unless stated · RTH 9:30–16:00 · extended 4:00–9:30 and 16:00–20:00 · overnight 20:00–4:00 on weekdays · weekend runs Friday 20:00 to Monday 4:00 and includes NYSE holidays · slip = mean of the buy and sell side of a market order walking the visible 20 levels · fills = share of snapshots the size fits inside those levels · "—" = not fillable in the median snapshot
slippage curve
hour of week
weekly · spread
weekly · depth ±25 bps
per round trip = 2 × median slippage + 2 × taker fee · funding uses the 30-day mean hourly rate, annualised, charged for a position held all day · slippage between tested sizes is interpolated on a log scale · ignores maker rebates, impact that persists after your fill, and fee tiers
25,878 snapshots · 2026-06-16 18:27 → 2026-09-30 18:15 UTC (106.0 days) · size decimals 4 · raw: /data/xyz/COST.json · method and caveats: methodology