# Why did I lose the Amazon Buy Box?

A playbook for an AI assistant connected to Nova. It lists the products that lost the Buy Box, also called the Featured Offer, shows who holds it at what price, and ranks them by what the loss costs. It only reads your data.

Every step calls a Nova tool that reads your live Amazon data, so paste this into Claude, ChatGPT or any assistant connected to Nova's MCP server. Run it daily or weekly.

```text
Use Nova to find which Amazon Buy Boxes I lost, why, and which to fix first.

Period: the last 14 complete days against the 14 before. If I name other dates, use those.

1. List what is lost today. Call Nova's query_listing_health with problems ["buyBoxLost", "hijacker", "undercut", "notBuyable"], statuses ["Active"], sort "sales", limit 30. For each listing give the Buy Box owner and price, your price, and the hijack and undercut flags. Read metadata.problemCounts for the totals.

2. Read what it costs. Call Nova's query_metrics with groupBy "childAsin", the period against the baseline, with buyBoxPercentage, netSales and units, sorted by netSales, limit 30. Ignore products with only a few units, because the share means little there. List where buyBoxPercentage fell and net sales fell with it.

3. Explain the biggest ones. For the 5 biggest losses, call Nova's explain_movement with the SKU. It returns net sales per unit, Featured Offer share, customer promotions, ad spend, ACOS, impressions and clicks.

4. Check stock. Call Nova's query_inventory with those products. Low or no stock can cost the Buy Box. Stock is the state today.

5. Check the listing. From step 1, read the driving issue, severity and any suppression. A listing that is not buyable cannot win it.

6. Check what changed. Call Nova's list_events for the period. Name any price change that lines up with the loss.

7. Report, one row per product, largest loss first: share before and now, net sales lost, the owner and price gap, the likeliest cause (price, stock, hijacker, listing or unclear), and one action. Then the three to fix first.

Rules: owner and price are the state now, so never present them as last week's. These are correlations, so state the likeliest cause, not a proven one. Do not recommend a price cut without reading the margin with netProfitMargin first. Relay every notice Nova returns. You cannot change prices or report a seller.
```

## How to read the result

| What you see | What it usually means | What to do |
| --- | --- | --- |
| Another seller below your price | Undercut | Read your margin, then decide on price |
| Same price, share still falling | Not only price | Check stock, delivery speed and seller metrics in Seller Central |
| Low stock and share falling | Stock is the likely cause | Replenish before you touch price |
| Hijacker flag on your brand | An unauthorised offer | Check it, and report it through Seller Central or Brand Registry |
| Not buyable, or suppressed | No offer to win | Fix the listing issue first |
| Share down on a product with few units | Too little data | Ignore it |

## Limits

- The Buy Box owner and price are the state now. Nova keeps your share per product over time, not who held it each day.
- Nova does not see a rival's sales or ad spend.
- Nova shows what moved at the same time. It does not prove why.
- It does not read your seller metrics or Amazon's own Buy Box rules.
- Stock is the state today, not a history.
- Amazon does not report the Buy Box on Vendor Central.
- Nova does not change prices or report sellers.