From 62e3f70d24241e0068ac50fba0218727e28f9a24 Mon Sep 17 00:00:00 2001
From: Thomas Kaul <4159106+dtslvr@users.noreply.github.com>
Date: Mon, 12 Oct 2026 19:49:52 +0200
Subject: [PATCH] Bugfix/start date of investment timeline (#8122)

* Fix start date of investment timeline

* Update changelog
---
 CHANGELOG.md                                  |  1 +
 .../app/portfolio/portfolio.service.spec.ts   | 46 ++++++++++++++++++-
 .../src/app/portfolio/portfolio.service.ts    |  3 +-
 3 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f04aa58104..e2fc877bc6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fixed the border color of the drop area in the import activities dialog (dark mode)
+- Fixed the start date of the investment timeline chart on the analysis page
 - Fixed the matching of assets and accounts in the import of activities with _Ghostfolio AI_ (experimental)
 - Fixed an issue where the update of an activity could change the asset class and asset sub class of an asset profile which does not belong to the user
 
diff --git a/apps/api/src/app/portfolio/portfolio.service.spec.ts b/apps/api/src/app/portfolio/portfolio.service.spec.ts
index ac5dfebd49..a043a10309 100644
--- a/apps/api/src/app/portfolio/portfolio.service.spec.ts
+++ b/apps/api/src/app/portfolio/portfolio.service.spec.ts
@@ -23,7 +23,7 @@ import {
   Filter,
   PortfolioSummary
 } from '@ghostfolio/common/interfaces';
-import { AccountWithBalance } from '@ghostfolio/common/types';
+import { AccountWithBalance, DateRange } from '@ghostfolio/common/types';
 
 import { AssetClass, DataSource, Prisma } from '@prisma/client';
 import { Big } from 'big.js';
@@ -842,6 +842,50 @@ describe('PortfolioService', () => {
     });
   });
 
+  describe('getInvestments', () => {
+    afterEach(() => {
+      jest.useRealTimers();
+    });
+
+    it.each(['2025', 'ytd'] as DateRange[])(
+      'should exclude the investment of the start date of the date range %s',
+      async (dateRange) => {
+        jest.useFakeTimers().setSystemTime(parseDate('2025-06-15').getTime());
+
+        jest
+          .spyOn(activitiesService, 'getActivitiesForPortfolioCalculator')
+          .mockResolvedValue({ activities: [{} as Activity], count: 1 });
+
+        jest
+          .spyOn(portfolioCalculatorFactory, 'createCalculator')
+          .mockReturnValue({
+            getSnapshot: jest.fn().mockResolvedValue({
+              historicalData: [
+                { date: '2024-12-31', investmentValueWithCurrencyEffect: 100 },
+                { date: '2025-01-01', investmentValueWithCurrencyEffect: 200 }
+              ]
+            })
+          } as unknown as PortfolioCalculator);
+
+        jest.spyOn(userService, 'user').mockResolvedValue({
+          id: userDummyData.id,
+          settings: {
+            settings: {
+              baseCurrency: 'CHF'
+            }
+          }
+        } as unknown as Awaited<ReturnType<typeof userService.user>>);
+
+        const { investments } = await portfolioService.getInvestments({
+          dateRange,
+          userId: userDummyData.id
+        });
+
+        expect(investments).toEqual([{ date: '2025-01-01', investment: 200 }]);
+      }
+    );
+  });
+
   describe('getPerformance', () => {
     let getPerformanceOfCalculator: jest.Mock;
 
diff --git a/apps/api/src/app/portfolio/portfolio.service.ts b/apps/api/src/app/portfolio/portfolio.service.ts
index c67bb51064..ebd05805f5 100644
--- a/apps/api/src/app/portfolio/portfolio.service.ts
+++ b/apps/api/src/app/portfolio/portfolio.service.ts
@@ -98,7 +98,6 @@ import {
   endOfDay,
   format,
   isAfter,
-  isBefore,
   isSameMonth,
   isSameYear,
   min,
@@ -564,7 +563,7 @@ export class PortfolioService {
       const date = resetHours(parseDate(historicalDataItem.date));
 
       return (
-        !isBefore(date, resetHours(startDate)) &&
+        isAfter(date, resetHours(startDate)) &&
         !isAfter(date, resetHours(endDate))
       );
     });