diff --git a/docs/reference/cli/contributions.md b/docs/reference/cli/contributions.md
index 880a83b..06f7c3b 100644
--- a/docs/reference/cli/contributions.md
+++ b/docs/reference/cli/contributions.md
@@ -65,6 +65,10 @@ actually realized. If you delete the lot outright instead, there is no
 for a recent sale, less so for one made long before the end of the
 window. The report labels which was used: `at close` or `at mark`.
 
+An option removed after it expired is worth $0 -- whether it expired
+worthless or was exercised, the premium isn't proceeds. (An exercise
+shows up separately, as the stock and cash that moved.)
+
 Closing a position that has accumulated a lot per dividend
 reinvestment retires many lots at once, so sales collapse to one line
 per account and symbol, carrying the lot count and the total.
diff --git a/src/commands/contributions.zig b/src/commands/contributions.zig
index cc244ea..618e317 100644
--- a/src/commands/contributions.zig
+++ b/src/commands/contributions.zig
@@ -1714,7 +1714,7 @@ fn secondaryKey(allocator: std.mem.Allocator, lot: Lot) ![]u8 {
 /// applies. `lot.price` and `lot.open_price` are already in the lot's
 /// own share-class terms (preadjusted) -> ratio must NOT be applied.
 /// See the "Pricing model" doc-block in models/portfolio.zig.
-fn outflowUnitValue(lot: Lot, prices: *const std.StringHashMap(f64)) f64 {
+fn outflowUnitValue(lot: Lot, prices: *const std.StringHashMap(f64), as_of: Date) f64 {
     return switch (lot.security_type) {
         .stock => blk: {
             if (prices.get(lot.priceSymbol())) |p| break :blk lot.effectivePrice(p, false);
@@ -1725,11 +1725,61 @@ fn outflowUnitValue(lot: Lot, prices: *const std.StringHashMap(f64)) f64 {
         .cash => 1.0,
         // Face value per share.
         .cd => lot.open_price,
-        .option => lot.open_price * lot.multiplier,
+        // An option removed on or after its maturity expired, and an
+        // expired option is worth nothing: valuing it at its opening
+        // premium invented sale proceeds (a long call that died
+        // worthless "funded" part of the next buy) or, for a written
+        // one, a negative sale. If it was exercised or assigned, the
+        // stock and cash that moved show up as their own changes.
+        .option => if (lot.hasMaturedAsOf(as_of)) 0 else lot.open_price * lot.multiplier,
         else => lot.open_price,
     };
 }
 
+// ── Expired options (see `outflowUnitValue`) ──
+
+fn testOption(shares: f64, account: []const u8) Lot {
+    return .{ .symbol = "SPY 01/16/2026 700 C", .shares = shares, .open_date = Date.fromYmd(2025, 6, 1), .open_price = 5, .security_type = .option, .maturity_date = Date.fromYmd(2026, 1, 16), .underlying = "SPY", .strike = 700, .account = account };
+}
+
+test "outflowUnitValue: an option deleted after it expired funds nothing" {
+    // A long call that died worthless used to be valued at its $500
+    // opening premium, and that phantom "sale" funded part of a real
+    // $2,000 fresh-money buy the same week - so only $1,500 counted.
+    var arena_state = std.heap.ArenaAllocator.init(std.testing.allocator);
+    defer arena_state.deinit();
+    const a = arena_state.allocator();
+    var prices = std.StringHashMap(f64).init(a);
+    const buy: Lot = .{ .symbol = "VTI", .shares = 8, .open_date = Date.fromYmd(2026, 1, 20), .open_price = 250, .account = "Sample Brokerage" };
+    const report = try computeReport(a, &.{testOption(1, "Sample Brokerage")}, &.{buy}, &prices, Date.fromYmd(2026, 1, 25), .{});
+    try std.testing.expectApproxEqAbs(@as(f64, 2000), attributionTotalForTest(report), 0.01);
+}
+
+test "outflowUnitValue: a written option expiring is no inflow either" {
+    // The mirror image. Negative shares made the old valuation a
+    // +$500 "uncounted inflow" and a "sold at mark (-$500.00)" line.
+    var arena_state = std.heap.ArenaAllocator.init(std.testing.allocator);
+    defer arena_state.deinit();
+    const a = arena_state.allocator();
+    var prices = std.StringHashMap(f64).init(a);
+    const report = try computeReport(a, &.{testOption(-1, "Sample Brokerage")}, &.{}, &prices, Date.fromYmd(2026, 1, 25), .{});
+    const unc = uncountedTotals(report.changes);
+    try std.testing.expectApproxEqAbs(@as(f64, 0), unc.in, 0.01);
+    try std.testing.expectApproxEqAbs(@as(f64, 0), unc.out, 0.01);
+}
+
+test "outflowUnitValue: an option deleted BEFORE expiry still funds at its premium" {
+    // Only expiry zeroes it. Closing a position early (deleting it
+    // before maturity) keeps the existing cost-basis proxy.
+    var arena_state = std.heap.ArenaAllocator.init(std.testing.allocator);
+    defer arena_state.deinit();
+    const a = arena_state.allocator();
+    var prices = std.StringHashMap(f64).init(a);
+    const buy: Lot = .{ .symbol = "VTI", .shares = 8, .open_date = Date.fromYmd(2026, 1, 10), .open_price = 250, .account = "Sample Brokerage" };
+    const report = try computeReport(a, &.{testOption(1, "Sample Brokerage")}, &.{buy}, &prices, Date.fromYmd(2026, 1, 12), .{});
+    try std.testing.expectApproxEqAbs(@as(f64, 1500), attributionTotalForTest(report), 0.01);
+}
+
 /// Dollars-per-share realized when a lot was closed in place.
 ///
 /// `close_price` is authoritative - it is what the sale actually got,
@@ -1748,7 +1798,7 @@ fn closeUnitValue(lot: Lot, prices: *const std.StringHashMap(f64), as_of: Date)
             else => cp,
         };
     }
-    return outflowUnitValue(lot, prices);
+    return outflowUnitValue(lot, prices, as_of);
 }
 
 /// Tolerance for "did the share total stay the same" check when
@@ -2231,7 +2281,7 @@ fn computeReport(
         // this was populated, `value()` was 0 for every removal and a
         // sale funded nothing - so an intra-account reallocation read as
         // a full external contribution.
-        const unit_value = outflowUnitValue(lot, prices);
+        const unit_value = outflowUnitValue(lot, prices, as_of);
 
         try changes.append(allocator, .{
             .kind = kind,