From 5e9ac0169e912d1480ca9a5f6db06b3f52fee8fb Mon Sep 17 00:00:00 2001
From: Thomas Kaul <4159106+dtslvr@users.noreply.github.com>
Date: Sat, 1 Aug 2026 10:41:01 +0200
Subject: [PATCH] Task/remove deprecated firstOrderDate from portfolio
 performance endpoint response (#7483)

* Remove deprecated firstOrderDate

* Update changelog
---
 CHANGELOG.md                                                | 1 +
 apps/api/src/app/portfolio/portfolio.service.ts             | 2 --
 .../responses/portfolio-performance-response.interface.ts   | 6 ------
 3 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c47efb2e..b80a682c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Harmonized the data format of the export functionality
+- Removed the deprecated `firstOrderDate` attribute from the `GET api/v2/portfolio/performance` endpoint response
 - Improved the language localization for German (`de`)
 - Upgraded `prisma` from version `7.8.0` to `7.9.1`
 
diff --git a/apps/api/src/app/portfolio/portfolio.service.ts b/apps/api/src/app/portfolio/portfolio.service.ts
index d1aff3811..0a69cf32d 100644
--- a/apps/api/src/app/portfolio/portfolio.service.ts
+++ b/apps/api/src/app/portfolio/portfolio.service.ts
@@ -1035,7 +1035,6 @@ export class PortfolioService {
       return {
         chart: [],
         dateOfFirstActivity: undefined,
-        firstOrderDate: undefined,
         hasErrors: false,
         performance: {
           currentNetWorth: 0,
@@ -1093,7 +1092,6 @@ export class PortfolioService {
       errors,
       hasErrors,
       dateOfFirstActivity: parseDate(historicalData[0]?.date),
-      firstOrderDate: parseDate(historicalData[0]?.date),
       performance: {
         netPerformance,
         netPerformanceWithCurrencyEffect,
diff --git a/libs/common/src/lib/interfaces/responses/portfolio-performance-response.interface.ts b/libs/common/src/lib/interfaces/responses/portfolio-performance-response.interface.ts
index 104302de3..8177bd533 100644
--- a/libs/common/src/lib/interfaces/responses/portfolio-performance-response.interface.ts
+++ b/libs/common/src/lib/interfaces/responses/portfolio-performance-response.interface.ts
@@ -5,11 +5,5 @@ import { ResponseError } from './errors.interface';
 export interface PortfolioPerformanceResponse extends ResponseError {
   chart?: HistoricalDataItem[];
   dateOfFirstActivity: Date;
-
-  /**
-   * @deprecated Use `dateOfFirstActivity` instead
-   */
-  firstOrderDate: Date;
-
   performance: PortfolioPerformance;
 }