ASINs Stocking Out <7 Days, Amazon Seller Central

ASINs Stocking Out <7 Days for Amazon Seller Central accounts. Tracked live in Vortex IQ Nerve Centre. How to read it, why it matters, and how to act on it.

Metrics type: Supporting Metrics • Category: Inventory Forecasting

At a glance

The replenishment action queue. Every ASIN whose current sellable stock divided by its recent daily sales velocity gives fewer than seven days of cover. These are the SKUs about to go out of stock, and each one represents lost ordered product sales, a broken sales-velocity ranking signal, and wasted ad spend if campaigns keep running on them. The card is a live list, not a single number, so an operations or marketing owner can work straight down it.

What it counts	The count of ASINs where current_sellable_stock / 30-day daily velocity is below 7 days of cover. The list view shows each at-risk ASIN with its projected stockout date.
Velocity basis	A trailing 30-day average units-per-day, so a recent spike or a deal event can pull the projection in. Slow movers with lumpy sales can read noisy; fast steady movers are the reliable signal.
Stock basis	Sellable units only. Inbound, reserved, and unfulfillable units are excluded, because they cannot convert an order today. FBA “Available” is the closest Seller Central equivalent.
Fulfilment scope	Applies to both FBA and FBM, but the lead-time consequences differ: FBA stockouts also need inbound shipment and check-in time, so a 7-day FBA warning is effectively shorter once you account for receive time.
Why it matters	A stockout does not just lose today’s sales. It collapses the ASIN’s sales-velocity rank, drops it in search, and can hand the Buy Box to a competitor when you come back. Recovery takes longer than the outage.
Chart	Alert list, sorted by soonest projected stockout and by revenue at risk.
Time window	RT (real-time / live), refreshed each sync.
Alert trigger	>0. Any ASIN entering the under-7-days window raises the card.
Roles	owner, operations, marketing

Calculation

Calculated automatically from your Amazon Seller Central data. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading.

Worked example

A UK kitchenware brand running mostly FBA. Snapshot taken 14 Mar 26.

ASIN	Product	Sellable stock	30D velocity (units/day)	Days of cover	Projected stockout
B0XXXX1	Stainless steel pan, 24cm	84	18.0	4.7	18 Mar 26
B0XXXX2	Knife block set	36	7.5	4.8	19 Mar 26
B0XXXX3	Espresso tamper	22	4.0	5.5	19 Mar 26
B0XXXX4	Silicone spatula 3-pack	130	21.0	6.2	20 Mar 26
ASINs under 7 days (this card)	4

Card value          =  4 ASINs under 7 days of cover
Soonest stockout    =  B0XXXX1, projected 18 Mar 26 (4.7 days)
Combined daily run-rate at risk  ≈  18.0 + 7.5 + 4.0 + 21.0 = 50.5 units/day

Three things to notice:

1. The pan is the priority even though it has the most units. B0XXXX1 has 84 units but burns 18 a day, so it runs out first. Days of cover, not raw stock, sets the queue order. Work the list top-down by projected stockout date, not by unit count.
2. For FBA, 4.7 days is effectively already too late. Once you account for creating an inbound shipment, transit, and Amazon check-in (often several days to over a week), a 4.7-day warning means a gap is almost certain. Use this card as an early-warning trigger and pair it with Replenishment Recommendations for the suggested order quantity.
3. Pause ads before the shelf goes empty. If any of these ASINs has live Sponsored Products, the spend converts into nothing once stock hits zero, and you keep paying for clicks on an out-of-stock detail page. Cross-check Ad Spend on Out-of-Stock ASINs and Ad on OOS Detected.

With four ASINs in the window the card is raised (>0). The action is immediate: create inbound shipments for the FBA lines today, throttle or pause ads on anything that cannot be replenished in time, and check whether a backorder-friendly FBM offer can bridge the gap.

Sibling cards merchants should reference together

This card is the trigger. These tell you what to do about it:

Card	Why pair it with ASINs Stocking Out
Days of Cover (avg)	The portfolio-level version of this card. This list is the tail; Days of Cover is the average. A healthy average can still hide a dangerous tail.
Replenishment Recommendations	Converts each at-risk ASIN into a suggested reorder quantity and timing, the natural next click after reading this list.
Ad Spend on Out-of-Stock ASINs	If an ASIN here stocks out with ads still live, this is the money you bleed. Pause campaigns on these ASINs first.
Ad on OOS Detected	The real-time alert that ads are running on stock that has already hit zero.
Sell-Through Rate (FBA)	Context on how fast FBA stock is moving overall, which tells you whether the inbound plan is keeping pace.

Reconciling against Amazon Seller Central

Where to look in Seller Central:

The closest Amazon-native view is:

Seller Central → Inventory → FBA Inventory → Restock Inventory (the “Days of supply” and “Recommended” columns) and Inventory → Manage Inventory for sellable quantity per SKU.

Amazon’s own Restock Inventory tool projects days of supply and suggests reorder quantities. This card mirrors that intent but uses a trailing 30-day velocity, so the numbers will be in the same range without tying out exactly.

Timing and reporting-lag table:

Topic	Detail
Velocity window	This card uses a trailing 30-day average. Amazon’s Restock tool blends multiple horizons and applies its own forecast, so days-of-cover figures will differ in detail while agreeing on which ASINs are at risk.
Stock freshness	Sellable quantity is read each sync. FBA quantities can lag real warehouse state by a short window, and units in transfer between fulfilment centres may briefly show as unavailable.
FBM stock	For seller-fulfilled offers, the sellable quantity is whatever you have published to Amazon, which depends on how often your inventory feed updates.
Lead time not modelled	The 7-day threshold is days of cover, not days until you can replenish. Add your own inbound lead time on top, especially for FBA.

Why our list may legitimately differ from Seller Central:

Reason	Direction	Why
Forecast method	Differs in detail	Amazon’s Restock tool uses a proprietary forecast; this card uses a simple trailing 30-day velocity. Both flag the same fast movers, but slow or seasonal items can land on different sides of the 7-day line.
Velocity spikes	Ours can over- or under-warn	A recent deal or Prime Day spike inflates 30-day velocity and pulls more ASINs into the window; a recent stockout deflates velocity and can hide a normally fast mover.
Inbound treatment	Both exclude inbound	Neither this card nor the sellable-quantity view counts inbound units as cover, which is correct: inbound stock cannot convert an order today.

Cross-connector reconciliation:

Card	Expected relationship	What causes legitimate divergence
Shopify / other channel inventory	Shared physical stock, separate views. If the same units are sold across Amazon and another channel, true days of cover is lower than any single channel shows.	Without a unified inventory feed, each channel sees only its own allocation and over-states cover. A multichannel seller should net demand across channels.

Known limitations / merchant FAQs

Why does an ASIN appear here when Amazon’s Restock tool says I am fine? The two use different forecasts. This card uses a straightforward trailing 30-day velocity, while Amazon blends several horizons and applies a seasonal model. They agree on steady fast movers and can disagree on lumpy or seasonal items. Treat this card as an early warning and confirm the reorder quantity against Replenishment Recommendations.

Is 7 days of cover enough warning? For FBM, often yes. For FBA, usually no, because you also need shipment creation, transit, and check-in time before new units become sellable. Treat the under-7-days list as “act now” rather than “act this week” for FBA lines.

A slow-moving ASIN keeps flickering on and off this list. Why? Low-velocity items with lumpy sales produce noisy days-of-cover estimates: one order can swing the projection by days. The card is most reliable for steady fast movers. For long-tail items, judge by absolute stock as well as days of cover.

Does this include inbound or reserved units? No. It counts sellable units only, because inbound and reserved units cannot fulfil an order today. That is intentional, it keeps the warning honest.

What should I do the moment an ASIN lands here? Three things: create the inbound shipment (FBA) or update your feed (FBM), pause or throttle ads on that ASIN if it cannot be replenished in time, and check whether a temporary FBM offer can bridge the gap so the listing never goes fully dark.

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Tracked live in Vortex IQ Nerve Centre

ASINs Stocking Out <7 Days is one of hundreds of KPI pulses Vortex IQ tracks across Amazon Seller Central and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English.

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