Bugfix/market price in base currency during the portfolio snapshot calculation (#5828)

* Add fallback for market price in base currency

* Update changelog

CHANGELOG.md

@@ -26,6 +26,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed the style in the footer row of the accounts table
 - Fixed the rendering of names and symbols for custom assets in the import activities dialog
 
+### Fixed
+
+- Fixed an issue with the market price in base currency during the portfolio snapshot calculation
+
 ## 2.210.1 - 2025-10-22
 
 ### Added

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

@@ -336,7 +336,7 @@ export abstract class PortfolioCalculator {
       ).mul(
         exchangeRatesByCurrency[`${item.currency}${this.currency}`]?.[
           endDateString
-        ]
+        ] ?? 1
       );
 
       const {