Handle division by zero

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

@@ -700,15 +700,17 @@ export class PortfolioService {
 
       const dividendYieldPercent = this.getAnnualizedPerformancePercent({
         daysInMarket: differenceInDays(new Date(), parseDate(firstBuyDate)),
-        netPerformancePercent: dividendInBaseCurrency.div(
-          timeWeightedInvestment
-        )
+        netPerformancePercent: timeWeightedInvestment.eq(0)
+          ? new Big(0)
+          : dividendInBaseCurrency.div(timeWeightedInvestment)
       });
 
       const dividendYieldPercentWithCurrencyEffect =
         this.getAnnualizedPerformancePercent({
           daysInMarket: differenceInDays(new Date(), parseDate(firstBuyDate)),
-          netPerformancePercent: dividendInBaseCurrency.div(
+          netPerformancePercent: timeWeightedInvestmentWithCurrencyEffect.eq(0)
+            ? new Big(0)
+            : dividendInBaseCurrency.div(
                 timeWeightedInvestmentWithCurrencyEffect
               )
         });