diff --git a/lib/ranking.ts b/lib/ranking.ts
index f2a9f434..8657d85f 100644
--- a/lib/ranking.ts
+++ b/lib/ranking.ts
@@ -1,5 +1,6 @@
 import { type Address, formatUnits } from "viem";
-import { get24hPriceChange, getTokenTVL } from "./price";
+import { get24hPriceChange, getTokenTVL, getBatchTokenData } from "./price";
+import { getPlotUsdPrice } from "./usd-price";
 import { STORY_FACTORY } from "./contracts/constants";
 import type { Database, Storyline, User } from "./supabase";
 import type { SupabaseClient } from "@supabase/supabase-js";
@@ -282,3 +283,62 @@ export async function getTrendingStorylines(
   return enriched.slice(offset, offset + limit);
 }
 
+/**
+ * Fetch storylines sorted by market cap (descending), active-first.
+ * MCap = totalSupply × pricePerToken × PLOT/USD rate.
+ */
+export async function getMcapStorylines(
+  supabase: SupabaseClient<Database>,
+  limit = 20,
+  writerType?: number,
+  offset = 0,
+  genre?: string,
+  lang?: string,
+): Promise<Storyline[]> {
+  // Fetch all eligible stories — MCap needs the full set, not a recency-biased subset
+  let q = supabase
+    .from("storylines")
+    .select("*")
+    .eq("hidden", false)
+    .neq("token_address", "")
+    .eq("contract_address", STORY_FACTORY.toLowerCase());
+  if (writerType !== undefined) q = q.eq("writer_type", writerType);
+  if (genre) q = q.eq("genre", genre);
+  if (lang) q = q.eq("language", lang);
+  const { data } = await q.returns<Storyline[]>();
+  const storylines = data ?? [];
+  if (storylines.length === 0) return [];
+
+  const tokenAddresses = storylines
+    .map((sl) => sl.token_address)
+    .filter((addr): addr is string => !!addr) as Address[];
+
+  const [batchData, plotUsd] = await Promise.all([
+    getBatchTokenData(tokenAddresses),
+    getPlotUsdPrice(),
+  ]);
+
+  const usdRate = plotUsd ?? 0;
+
+  const withMcap = storylines.map((sl) => {
+    const data = batchData.get(sl.token_address?.toLowerCase() ?? "");
+    let mcap = 0;
+    if (data?.price) {
+      const supply = Number(data.price.totalSupply);
+      const price = Number(data.price.pricePerToken);
+      mcap = supply * price * usdRate;
+    }
+    return { ...sl, mcap };
+  });
+
+  // Active-first, then by MCap descending
+  withMcap.sort((a, b) => {
+    const aActive = getStoryStatus(a) === "active" ? 0 : 1;
+    const bActive = getStoryStatus(b) === "active" ? 0 : 1;
+    if (aActive !== bActive) return aActive - bActive;
+    return b.mcap - a.mcap;
+  });
+
+  return withMcap.slice(offset, offset + limit);
+}
+
diff --git a/package-lock.json b/package-lock.json
index 5def62a9..1c62f448 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "plotlink",
-  "version": "0.1.48",
+  "version": "0.1.49",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "plotlink",
-      "version": "0.1.48",
+      "version": "0.1.49",
       "workspaces": [
         "packages/*"
       ],
diff --git a/package.json b/package.json
index 24c88500..f5e679d1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "plotlink",
-  "version": "0.1.48",
+  "version": "0.1.49",
   "private": true,
   "workspaces": [
     "packages/*"
diff --git a/src/app/page.tsx b/src/app/page.tsx
index 12f5197a..393d5438 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -1,12 +1,12 @@
 import { createServerClient, type Storyline } from "../../lib/supabase";
 import { STORY_FACTORY } from "../../lib/contracts/constants";
-import { getTrendingStorylines } from "../../lib/ranking";
+import { getTrendingStorylines, getMcapStorylines } from "../../lib/ranking";
 import { StoryGrid } from "../components/StoryGrid";
 import { FilterBar, type WriterFilterValue } from "../components/FilterBar";
 import { GENRES, LANGUAGES } from "../../lib/genres";
 import Link from "next/link";
 
-const TABS = ["new", "trending"] as const;
+const TABS = ["new", "trending", "mcap"] as const;
 type Tab = (typeof TABS)[number];
 
 const WRITER_VALUES: WriterFilterValue[] = ["all", "human", "agent"];
@@ -148,5 +148,11 @@ async function queryTab(
       return getTrendingStorylines(supabase, PAGE_SIZE, wt, from, g, l);
     }
 
+    case "mcap": {
+      const wt = writer === "human" ? 0 : writer === "agent" ? 1 : undefined;
+      const g = genre !== "all" ? genre : undefined;
+      const l = lang !== "all" ? lang : undefined;
+      return getMcapStorylines(supabase, PAGE_SIZE, wt, from, g, l);
+    }
   }
 }
diff --git a/src/components/FilterBar.tsx b/src/components/FilterBar.tsx
index 14f425b1..c4971c46 100644
--- a/src/components/FilterBar.tsx
+++ b/src/components/FilterBar.tsx
@@ -8,6 +8,7 @@ const WRITER_OPTIONS = ["All", "Human", "AI"] as const;
 const SORT_OPTIONS = [
   { value: "new", label: "Recent" },
   { value: "trending", label: "Trending" },
+  { value: "mcap", label: "Market Cap" },
 ] as const;
 
 export type WriterFilterValue = "all" | "human" | "agent";