fix market price fetch in case symbols are missing

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

@@ -172,10 +172,12 @@ export class PortfolioCalculator {
       if (!marketSymbolMap[date]) {
         marketSymbolMap[date] = {};
       }
+      if (marketSymbol.marketPrice) {
         marketSymbolMap[date][marketSymbol.symbol] = new Big(
           marketSymbol.marketPrice
         );
       }
+    }
 
     let hasErrors = false;
     const startString = format(start, DATE_FORMAT);
@@ -377,11 +379,13 @@ export class PortfolioCalculator {
         if (!marketSymbolMap[date]) {
           marketSymbolMap[date] = {};
         }
+        if (marketSymbol.marketPrice) {
           marketSymbolMap[date][marketSymbol.symbol] = new Big(
             marketSymbol.marketPrice
           );
         }
       }
+    }
 
     const results = [];
     for (