diff --git a/apps/api/src/app/portfolio/portfolio-calculator-baln-buy-and-sell-in-two-activities.spec.ts b/apps/api/src/app/portfolio/portfolio-calculator-baln-buy-and-sell-in-two-activities.spec.ts
new file mode 100644
index 000000000..0566d230a
--- /dev/null
+++ b/apps/api/src/app/portfolio/portfolio-calculator-baln-buy-and-sell-in-two-activities.spec.ts
@@ -0,0 +1,161 @@
+import { CurrentRateService } from '@ghostfolio/api/app/portfolio/current-rate.service';
+import { ExchangeRateDataService } from '@ghostfolio/api/services/exchange-rate-data/exchange-rate-data.service';
+import { parseDate } from '@ghostfolio/common/helper';
+
+import Big from 'big.js';
+
+import { CurrentRateServiceMock } from './current-rate.service.mock';
+import { PortfolioCalculator } from './portfolio-calculator';
+
+jest.mock('@ghostfolio/api/app/portfolio/current-rate.service', () => {
+  return {
+    // eslint-disable-next-line @typescript-eslint/naming-convention
+    CurrentRateService: jest.fn().mockImplementation(() => {
+      return CurrentRateServiceMock;
+    })
+  };
+});
+
+describe('PortfolioCalculator', () => {
+  let currentRateService: CurrentRateService;
+  let exchangeRateDataService: ExchangeRateDataService;
+
+  beforeEach(() => {
+    currentRateService = new CurrentRateService(null, null, null);
+
+    exchangeRateDataService = new ExchangeRateDataService(
+      null,
+      null,
+      null,
+      null
+    );
+  });
+
+  describe('get current positions', () => {
+    it.only('with BALN.SW buy and sell in two activities', async () => {
+      const portfolioCalculator = new PortfolioCalculator({
+        currentRateService,
+        exchangeRateDataService,
+        currency: 'CHF',
+        orders: [
+          {
+            currency: 'CHF',
+            date: '2021-11-22',
+            dataSource: 'YAHOO',
+            fee: new Big(1.55),
+            name: 'Bâloise Holding AG',
+            quantity: new Big(2),
+            symbol: 'BALN.SW',
+            type: 'BUY',
+            unitPrice: new Big(142.9)
+          },
+          {
+            currency: 'CHF',
+            date: '2021-11-30',
+            dataSource: 'YAHOO',
+            fee: new Big(1.65),
+            name: 'Bâloise Holding AG',
+            quantity: new Big(1),
+            symbol: 'BALN.SW',
+            type: 'SELL',
+            unitPrice: new Big(136.6)
+          },
+          {
+            currency: 'CHF',
+            date: '2021-11-30',
+            dataSource: 'YAHOO',
+            fee: new Big(0),
+            name: 'Bâloise Holding AG',
+            quantity: new Big(1),
+            symbol: 'BALN.SW',
+            type: 'SELL',
+            unitPrice: new Big(136.6)
+          }
+        ]
+      });
+
+      portfolioCalculator.computeTransactionPoints();
+
+      const spy = jest
+        .spyOn(Date, 'now')
+        .mockImplementation(() => parseDate('2021-12-18').getTime());
+
+      const chartData = await portfolioCalculator.getChartData({
+        start: parseDate('2021-11-22')
+      });
+
+      const currentPositions = await portfolioCalculator.getCurrentPositions(
+        parseDate('2021-11-22')
+      );
+
+      const investments = portfolioCalculator.getInvestments();
+
+      const investmentsByMonth = portfolioCalculator.getInvestmentsByGroup({
+        data: chartData,
+        groupBy: 'month'
+      });
+
+      spy.mockRestore();
+
+      expect(currentPositions).toEqual({
+        currentValue: new Big('0'),
+        errors: [],
+        grossPerformance: new Big('-12.6'),
+        grossPerformancePercentage: new Big('-0.0440867739678096571'),
+        grossPerformancePercentageWithCurrencyEffect: new Big(
+          '-0.0440867739678096571'
+        ),
+        grossPerformanceWithCurrencyEffect: new Big('-12.6'),
+        hasErrors: false,
+        netPerformance: new Big('-15.8'),
+        netPerformancePercentage: new Big('-0.0552834149755073478'),
+        netPerformancePercentageWithCurrencyEffect: new Big(
+          '-0.0552834149755073478'
+        ),
+        netPerformanceWithCurrencyEffect: new Big('-15.8'),
+        positions: [
+          {
+            averagePrice: new Big('0'),
+            currency: 'CHF',
+            dataSource: 'YAHOO',
+            fee: new Big('3.2'),
+            firstBuyDate: '2021-11-22',
+            grossPerformance: new Big('-12.6'),
+            grossPerformancePercentage: new Big('-0.0440867739678096571'),
+            grossPerformancePercentageWithCurrencyEffect: new Big(
+              '-0.0440867739678096571'
+            ),
+            grossPerformanceWithCurrencyEffect: new Big('-12.6'),
+            investment: new Big('0'),
+            investmentWithCurrencyEffect: new Big('0'),
+            netPerformance: new Big('-15.8'),
+            netPerformancePercentage: new Big('-0.0552834149755073478'),
+            netPerformancePercentageWithCurrencyEffect: new Big(
+              '-0.0552834149755073478'
+            ),
+            netPerformanceWithCurrencyEffect: new Big('-15.8'),
+            marketPrice: 148.9,
+            marketPriceInBaseCurrency: 148.9,
+            quantity: new Big('0'),
+            symbol: 'BALN.SW',
+            timeWeightedInvestment: new Big('285.8'),
+            timeWeightedInvestmentWithCurrencyEffect: new Big('285.8'),
+            transactionCount: 2
+          }
+        ],
+        totalInvestment: new Big('0'),
+        totalInvestmentWithCurrencyEffect: new Big('0')
+      });
+
+      expect(investments).toEqual([
+        { date: '2021-11-22', investment: new Big('285.8') },
+        { date: '2021-11-30', investment: new Big('0') }
+      ]);
+
+      expect(investmentsByMonth).toEqual([
+        { date: '2021-11-01', investment: 0 },
+        { date: '2021-12-01', investment: 0 }
+      ]);
+    });
+  });
+});