diff --git a/src/modules/market/composables/useMarket.ts b/src/modules/market/composables/useMarket.ts
index 47ccaa0..66af02c 100644
--- a/src/modules/market/composables/useMarket.ts
+++ b/src/modules/market/composables/useMarket.ts
@@ -14,6 +14,32 @@ const MARKET_EVENT_KINDS = {
   PRODUCT: 30018
 } as const
 
+/**
+ * Resolve a product's parent stall id from the event.
+ *
+ * NIP-15 lists `stall_id` inside the JSON `content`, but some publishers
+ * (older nostrmarket builds, third-party clients) only emit the parent
+ * reference via an `a` tag of the form
+ *   ["a", "30017:<merchantPubkey>:<stallId>"]
+ *
+ * Read content first, then fall back to the tag, then a sentinel that won't
+ * match any real stall. Returning the tag form prevents "Unknown Stall"
+ * from sticking when the JSON omits the field.
+ */
+function resolveStallId(event: any, productData: any): string {
+  if (productData?.stall_id && typeof productData.stall_id === 'string') {
+    return productData.stall_id
+  }
+  const aTag = event.tags?.find(
+    (t: any) => Array.isArray(t) && t[0] === 'a' && typeof t[1] === 'string' && t[1].startsWith(`${MARKET_EVENT_KINDS.STALL}:`)
+  )
+  if (aTag) {
+    const parts = aTag[1].split(':')
+    if (parts[2]) return parts[2]
+  }
+  return 'unknown'
+}
+
 export function useMarket() {
   const marketStore = useMarketStore()
   const relayHub = injectService(SERVICE_TOKENS.RELAY_HUB) as any
@@ -315,7 +341,7 @@ export function useMarket() {
 
         try {
           const productData = JSON.parse(latestEvent.content)
-          const stallId = productData.stall_id || 'unknown'
+          const stallId = resolveStallId(latestEvent, productData)
 
           // Extract categories from Nostr event tags (standard approach)
           const categories = latestEvent.tags
@@ -515,7 +541,7 @@ export function useMarket() {
       const productId = event.tags.find((tag: any) => tag[0] === 'd')?.[1]
       if (productId) {
         const productData = JSON.parse(event.content)
-        const stallId = productData.stall_id || 'unknown'
+        const stallId = resolveStallId(event, productData)
 
         // Extract categories from Nostr event tags (standard approach)
         const categories = event.tags