diff --git a/README.md b/README.md
index 68e5284..92e97aa 100644
--- a/README.md
+++ b/README.md
@@ -61,10 +61,14 @@ XML response format:
 Use cron to keep the cache warm for all symbols in your portfolio:
 
 ```sh
-# Refresh all portfolio symbols nightly at 5pm ET (after market close)
+# Refresh all portfolio symbols daily at 5pm ET (after market close)
 0 17 * * 1-5 cd /path/to/workdir && ZFIN_PORTFOLIO=portfolio.srf zfin-server refresh
 ```
 
+The candle cache TTL is 23h45m (not a full 24h), providing a 15-minute jitter
+buffer so daily cron runs at the same time always see stale data and trigger a
+fresh fetch. Dividend and earnings TTLs are 14 and 30 days respectively.
+
 The `refresh` command reads the portfolio SRF file (defaults to `portfolio.srf`
 in the current directory if `ZFIN_PORTFOLIO` is not set), extracts all stock and
 watch symbols, and fetches candles, dividends, and earnings for each.
diff --git a/build.zig.zon b/build.zig.zon
index 46e66d3..35158b8 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -14,8 +14,8 @@
             .hash = "httpz-0.0.0-PNVzrBtMBwAPcQx3mNEgat3Xbsynw-eIC9SmOX5M9XtP",
         },
         .zfin = .{
-            .url = "git+https://git.lerch.org/lobo/zfin.git#d25d6acb9b9643e47257f61b489f5fa7fbbac7f3",
-            .hash = "zfin-0.0.0-J-B21qPuCgDINNDuVwrUiIyzh1i-H8yv1ySdbCMAishl",
+            .url = "git+https://git.lerch.org/lobo/zfin.git#31ae11cec0c16fcc60c5847b256c4b750aa8dd16",
+            .hash = "zfin-0.0.0-J-B21rbwCgALvwhOMCdo0yzEtrD-rF-YuSB8KuEVViI3",
         },
     },
 }
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 7c33147..85c737c 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -2,6 +2,7 @@ FROM scratch
 COPY ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 COPY zfin-server /zfin-server
 ENV HOME=/home/zfin-server
+WORKDIR /home/zfin-server
 USER 1000:1000
 EXPOSE 8080
 ENTRYPOINT ["/zfin-server", "serve"]
diff --git a/src/main.zig b/src/main.zig
index 0781838..8a83c2c 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -270,12 +270,6 @@ fn printRateLimitWait(svc: *zfin.DataService, stdout: *std.Io.Writer) !void {
     }
 }
 
-/// Mutual funds typically have 5-letter tickers ending in X.
-/// These don't have quarterly earnings on Finnhub.
-fn isMutualFund(symbol: []const u8) bool {
-    return symbol.len == 5 and symbol[4] == 'X';
-}
-
 /// Format as percentage (e.g., 0.1234 -> "12.34000"), or "null" if absent.
 fn fmtPct(arena: std.mem.Allocator, value: ?f64) []const u8 {
     if (value) |v| return std.fmt.allocPrint(arena, "{d:.5}", .{v * 100.0}) catch "null";
@@ -417,18 +411,14 @@ fn refresh(allocator: std.mem.Allocator) !void {
             sym_ok = false;
         }
 
-        // Earnings (skip for mutual funds — they don't report quarterly earnings)
-        if (!isMutualFund(sym)) {
-            try printRateLimitWait(&svc, stdout);
-            if (svc.getEarnings(sym)) |result| {
-                allocator.free(result.data);
-                try stdout.print(", earnings ok", .{});
-            } else |err| {
-                try stdout.print(", earnings FAILED ({s})", .{@errorName(err)});
-                sym_ok = false;
-            }
-        } else {
-            try stdout.print(", earnings skipped (fund)", .{});
+        // Earnings
+        try printRateLimitWait(&svc, stdout);
+        if (svc.getEarnings(sym)) |result| {
+            allocator.free(result.data);
+            try stdout.print(", earnings ok", .{});
+        } else |err| {
+            try stdout.print(", earnings FAILED ({s})", .{@errorName(err)});
+            sym_ok = false;
         }
 
         try stdout.print("\n", .{});