Bugfix/time in market of portfolio summary to be empty if no activity (#7428)

* Fix time in market if no activity

* Update changelog

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Fixed the time in market of the portfolio summary to be empty if there is no activity
+
 ## 3.35.0 - 2026-07-27
 
 ### Added

apps/api/src/app/portfolio/calculator/portfolio-calculator.ts

@@ -816,15 +816,18 @@ export abstract class PortfolioCalculator {
     let firstAccountBalanceDate: Date;
     let firstActivityDate: Date;
 
+    if (this.accountBalanceItems?.length > 0) {
       try {
-      const firstAccountBalanceDateString = this.accountBalanceItems[0]?.date;
+        const firstAccountBalanceDateString = this.accountBalanceItems[0].date;
         firstAccountBalanceDate = firstAccountBalanceDateString
           ? parseDate(firstAccountBalanceDateString)
           : new Date();
       } catch (error) {
         firstAccountBalanceDate = new Date();
       }
+    }
 
+    if (this.transactionPoints?.length > 0) {
       try {
         const firstActivityDateString = this.transactionPoints[0].date;
         firstActivityDate = firstActivityDateString
@@ -833,8 +836,19 @@ export abstract class PortfolioCalculator {
       } catch (error) {
         firstActivityDate = new Date();
       }
+    }
+
+    const dates = [firstAccountBalanceDate, firstActivityDate].filter(
+      (date) => {
+        return !!date;
+      }
+    );
+
+    if (dates.length === 0) {
+      return undefined;
+    }
 
-    return min([firstAccountBalanceDate, firstActivityDate]);
+    return min(dates);
   }
 
   protected abstract getSymbolMetrics({

apps/api/src/app/portfolio/portfolio.service.ts

@@ -1986,7 +1986,9 @@ export class PortfolioService {
       .minus(liabilities)
       .toNumber();
 
-    const daysInMarket = differenceInDays(new Date(), dateOfFirstActivity);
+    const daysInMarket = dateOfFirstActivity
+      ? differenceInDays(new Date(), dateOfFirstActivity)
+      : 0;
 
     const annualizedPerformancePercent = getAnnualizedPerformancePercent({
       daysInMarket,

apps/client/src/app/components/portfolio-summary/portfolio-summary.component.ts

@@ -116,7 +116,7 @@ export class GfPortfolioSummaryComponent implements OnChanges {
           }
         );
       } else {
-        this.timeInMarket = '-';
+        this.timeInMarket = '–';
       }
     } else {
       this.timeInMarket = undefined;

libs/common/src/lib/interfaces/portfolio-summary.interface.ts

@@ -6,7 +6,7 @@ export interface PortfolioSummary extends PortfolioPerformance {
   annualizedPerformancePercent: number;
   annualizedPerformancePercentWithCurrencyEffect: number;
   cash: number;
-  dateOfFirstActivity: Date;
+  dateOfFirstActivity?: Date;
   dividendInBaseCurrency: number;
   emergencyFund: {
     assets: number;