Fix tests

apps/api/src/app/portfolio/calculator/twr/portfolio-calculator-baln-buy-and-sell-in-two-activities.spec.ts

@@ -178,7 +178,7 @@ describe('PortfolioCalculator', () => {
               '-0.05528341497550734703'
             ),
             netPerformancePercentageWithCurrencyEffectMap: {
-              max: new Big('-0.18658152554233729881') // TODO: Different
+              max: new Big('-0.0552834149755073478')
             },
             netPerformanceWithCurrencyEffect: new Big('-15.8'),
             netPerformanceWithCurrencyEffectMap: {

apps/api/src/app/portfolio/calculator/twr/portfolio-calculator-baln-buy-and-sell.spec.ts

@@ -163,7 +163,7 @@ describe('PortfolioCalculator', () => {
               '-0.0552834149755073478'
             ),
             netPerformancePercentageWithCurrencyEffectMap: {
-              max: new Big('-0.18658152554233729881') // TODO: Different
+              max: new Big('-0.0552834149755073478')
             },
             netPerformanceWithCurrencyEffect: new Big('-15.8'),
             netPerformanceWithCurrencyEffectMap: {

apps/api/src/app/portfolio/calculator/twr/portfolio-calculator-novn-buy-and-sell.spec.ts

@@ -193,7 +193,7 @@ describe('PortfolioCalculator', () => {
               '0.13100263852242744063'
             ),
             netPerformancePercentageWithCurrencyEffectMap: {
-              max: new Big('0.14737796833773087071')
+              max: new Big('0.13100263852242744063')
             },
             netPerformanceWithCurrencyEffect: new Big('19.86'),
             netPerformanceWithCurrencyEffectMap: {

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

@@ -924,9 +924,16 @@ export class TWRPortfolioCalculator extends PortfolioCalculator {
       netPerformanceWithCurrencyEffectMap[dateRange] =
         netPerformanceValuesWithCurrencyEffect[
           format(endDate, DATE_FORMAT)
-        ].minus(
-          netPerformanceValuesWithCurrencyEffect[format(startDate, DATE_FORMAT)]
-        );
+        ]?.minus(
+          // If the date range is 'max', take 0 as a start value. Otherwise,
+          // the value of the end of the day of the start date is taken which
+          // can differ.
+          dateRange === 'max'
+            ? new Big(0)
+            : (netPerformanceValuesWithCurrencyEffect[
+                format(startDate, DATE_FORMAT)
+              ] ?? new Big(0))
+        ) ?? new Big(0);
 
       netPerformancePercentageWithCurrencyEffectMap[dateRange] = average.gt(0)
         ? netPerformanceWithCurrencyEffectMap[dateRange].div(average)