diff --git a/apps/api/src/app/portfolio/portfolio.controller.ts b/apps/api/src/app/portfolio/portfolio.controller.ts
index c4c9d677c..7820e04ac 100644
--- a/apps/api/src/app/portfolio/portfolio.controller.ts
+++ b/apps/api/src/app/portfolio/portfolio.controller.ts
@@ -4,6 +4,11 @@ import {
 } from '@ghostfolio/api/helper/object.helper';
 import { ExchangeRateDataService } from '@ghostfolio/api/services/exchange-rate-data.service';
 import { ImpersonationService } from '@ghostfolio/api/services/impersonation.service';
+import {
+  PortfolioItem,
+  PortfolioOverview,
+  PortfolioPerformance
+} from '@ghostfolio/helper/interfaces';
 import {
   getPermissions,
   hasPermission,
@@ -26,9 +31,6 @@ import { Response } from 'express';
 import { StatusCodes, getReasonPhrase } from 'http-status-codes';
 
 import { RequestWithUser } from '../interfaces/request-with-user.type';
-import { PortfolioItem } from './interfaces/portfolio-item.interface';
-import { PortfolioOverview } from './interfaces/portfolio-overview.interface';
-import { PortfolioPerformance } from './interfaces/portfolio-performance.interface';
 import {
   HistoricalDataItem,
   PortfolioPositionDetail
diff --git a/apps/api/src/app/portfolio/portfolio.service.ts b/apps/api/src/app/portfolio/portfolio.service.ts
index 51965663e..9542b4c57 100644
--- a/apps/api/src/app/portfolio/portfolio.service.ts
+++ b/apps/api/src/app/portfolio/portfolio.service.ts
@@ -5,6 +5,10 @@ import { ExchangeRateDataService } from '@ghostfolio/api/services/exchange-rate-
 import { ImpersonationService } from '@ghostfolio/api/services/impersonation.service';
 import { IOrder } from '@ghostfolio/api/services/interfaces/interfaces';
 import { RulesService } from '@ghostfolio/api/services/rules.service';
+import {
+  PortfolioItem,
+  PortfolioOverview
+} from '@ghostfolio/helper/interfaces';
 import { Inject, Injectable } from '@nestjs/common';
 import { REQUEST } from '@nestjs/core';
 import {
@@ -27,8 +31,6 @@ import { OrderService } from '../order/order.service';
 import { RedisCacheService } from '../redis-cache/redis-cache.service';
 import { UserService } from '../user/user.service';
 import { DateRange } from './interfaces/date-range.type';
-import { PortfolioItem } from './interfaces/portfolio-item.interface';
-import { PortfolioOverview } from './interfaces/portfolio-overview.interface';
 import {
   HistoricalDataItem,
   PortfolioPositionDetail
diff --git a/apps/api/src/models/interfaces/portfolio.interface.ts b/apps/api/src/models/interfaces/portfolio.interface.ts
index a3e377b58..269300bd9 100644
--- a/apps/api/src/models/interfaces/portfolio.interface.ts
+++ b/apps/api/src/models/interfaces/portfolio.interface.ts
@@ -1,7 +1,4 @@
-import {
-  PortfolioItem,
-  Position
-} from '@ghostfolio/api/app/portfolio/interfaces/portfolio-item.interface';
+import { PortfolioItem, Position } from '@ghostfolio/helper/interfaces';
 
 import { Order } from '../order';
 
diff --git a/apps/api/src/models/portfolio.ts b/apps/api/src/models/portfolio.ts
index d2f99e2ac..037f2cce2 100644
--- a/apps/api/src/models/portfolio.ts
+++ b/apps/api/src/models/portfolio.ts
@@ -1,9 +1,10 @@
+import { UNKNOWN_KEY } from '@ghostfolio/helper/config';
+import { getToday, getYesterday, resetHours } from '@ghostfolio/helper/helper';
 import {
   PortfolioItem,
+  PortfolioPerformance,
   Position
-} from '@ghostfolio/api/app/portfolio/interfaces/portfolio-item.interface';
-import { UNKNOWN_KEY } from '@ghostfolio/helper/config';
-import { getToday, getYesterday, resetHours } from '@ghostfolio/helper/helper';
+} from '@ghostfolio/helper/interfaces';
 import {
   add,
   format,
@@ -26,7 +27,6 @@ import * as roundTo from 'round-to';
 import { UserWithSettings } from '../app/interfaces/user-with-settings';
 import { OrderWithAccount } from '../app/order/interfaces/order-with-account.type';
 import { DateRange } from '../app/portfolio/interfaces/date-range.type';
-import { PortfolioPerformance } from '../app/portfolio/interfaces/portfolio-performance.interface';
 import { PortfolioPosition } from '../app/portfolio/interfaces/portfolio-position.interface';
 import { PortfolioReport } from '../app/portfolio/interfaces/portfolio-report.interface';
 import { DataProviderService } from '../services/data-provider.service';
diff --git a/apps/client/src/app/components/portfolio-performance-summary/portfolio-performance-summary.component.ts b/apps/client/src/app/components/portfolio-performance-summary/portfolio-performance-summary.component.ts
index a7fbe5f71..f26525f56 100644
--- a/apps/client/src/app/components/portfolio-performance-summary/portfolio-performance-summary.component.ts
+++ b/apps/client/src/app/components/portfolio-performance-summary/portfolio-performance-summary.component.ts
@@ -7,7 +7,7 @@ import {
   OnInit,
   ViewChild
 } from '@angular/core';
-import { PortfolioPerformance } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-performance.interface';
+import { PortfolioPerformance } from '@ghostfolio/helper/interfaces';
 import { Currency } from '@prisma/client';
 import { CountUp } from 'countup.js';
 import { isNumber } from 'lodash';
diff --git a/apps/client/src/app/components/portfolio-performance/portfolio-performance.component.ts b/apps/client/src/app/components/portfolio-performance/portfolio-performance.component.ts
index e411af378..609245e4d 100644
--- a/apps/client/src/app/components/portfolio-performance/portfolio-performance.component.ts
+++ b/apps/client/src/app/components/portfolio-performance/portfolio-performance.component.ts
@@ -4,7 +4,7 @@ import {
   Input,
   OnInit
 } from '@angular/core';
-import { PortfolioPerformance } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-performance.interface';
+import { PortfolioPerformance } from '@ghostfolio/helper/interfaces';
 import { Currency } from '@prisma/client';
 
 @Component({
diff --git a/apps/client/src/app/pages/home/home-page.component.ts b/apps/client/src/app/pages/home/home-page.component.ts
index d070e1ea2..cd1f9e031 100644
--- a/apps/client/src/app/pages/home/home-page.component.ts
+++ b/apps/client/src/app/pages/home/home-page.component.ts
@@ -2,7 +2,6 @@ import { ChangeDetectorRef, Component, OnDestroy, OnInit } from '@angular/core';
 import { MatDialog } from '@angular/material/dialog';
 import { ActivatedRoute, Router } from '@angular/router';
 import { DateRange } from '@ghostfolio/api/app/portfolio/interfaces/date-range.type';
-import { PortfolioPerformance } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-performance.interface';
 import { PortfolioPosition } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-position.interface';
 import { User } from '@ghostfolio/api/app/user/interfaces/user.interface';
 import { LineChartItem } from '@ghostfolio/client/components/line-chart/interfaces/line-chart.interface';
@@ -15,6 +14,7 @@ import {
   SettingsStorageService
 } from '@ghostfolio/client/services/settings-storage.service';
 import { TokenStorageService } from '@ghostfolio/client/services/token-storage.service';
+import { PortfolioPerformance } from '@ghostfolio/helper/interfaces';
 import { PortfolioOverview } from '@ghostfolio/helper/interfaces';
 import { hasPermission, permissions } from '@ghostfolio/helper/permissions';
 import { DeviceDetectorService } from 'ngx-device-detector';
diff --git a/apps/client/src/app/services/data.service.ts b/apps/client/src/app/services/data.service.ts
index 1b0b8bab2..7425aa8af 100644
--- a/apps/client/src/app/services/data.service.ts
+++ b/apps/client/src/app/services/data.service.ts
@@ -5,7 +5,6 @@ import { UpdateAccountDto } from '@ghostfolio/api/app/account/update-account.dto
 import { AdminData } from '@ghostfolio/api/app/admin/interfaces/admin-data.interface';
 import { CreateOrderDto } from '@ghostfolio/api/app/order/create-order.dto';
 import { UpdateOrderDto } from '@ghostfolio/api/app/order/update-order.dto';
-import { PortfolioPerformance } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-performance.interface';
 import {
   HistoricalDataItem,
   PortfolioPositionDetail
@@ -17,6 +16,7 @@ import { SymbolItem } from '@ghostfolio/api/app/symbol/interfaces/symbol-item.in
 import { UserItem } from '@ghostfolio/api/app/user/interfaces/user-item.interface';
 import { User } from '@ghostfolio/api/app/user/interfaces/user.interface';
 import { UpdateUserSettingsDto } from '@ghostfolio/api/app/user/update-user-settings.dto';
+import { PortfolioPerformance } from '@ghostfolio/helper/interfaces';
 import { InfoItem } from '@ghostfolio/helper/interfaces';
 import { PortfolioItem } from '@ghostfolio/helper/interfaces';
 import { PortfolioOverview } from '@ghostfolio/helper/interfaces';
diff --git a/libs/helper/src/lib/interfaces/index.ts b/libs/helper/src/lib/interfaces/index.ts
index bba58b117..61f40181c 100644
--- a/libs/helper/src/lib/interfaces/index.ts
+++ b/libs/helper/src/lib/interfaces/index.ts
@@ -2,5 +2,14 @@ import { Access } from './access.interface';
 import { InfoItem } from './info-item.interface';
 import { PortfolioItem } from './portfolio-item.interface';
 import { PortfolioOverview } from './portfolio-overview.interface';
+import { PortfolioPerformance } from './portfolio-performance.interface';
+import { Position } from './position.interface';
 
-export { Access, InfoItem, PortfolioItem, PortfolioOverview };
+export {
+  Access,
+  InfoItem,
+  PortfolioItem,
+  PortfolioOverview,
+  PortfolioPerformance,
+  Position
+};
diff --git a/libs/helper/src/lib/interfaces/portfolio-item.interface.ts b/libs/helper/src/lib/interfaces/portfolio-item.interface.ts
index 3c1dd3ae3..0891ad3a0 100644
--- a/libs/helper/src/lib/interfaces/portfolio-item.interface.ts
+++ b/libs/helper/src/lib/interfaces/portfolio-item.interface.ts
@@ -1,4 +1,4 @@
-import { Currency } from '@prisma/client';
+import { Position } from '@ghostfolio/helper/interfaces';
 
 export interface PortfolioItem {
   date: string;
@@ -7,14 +7,3 @@ export interface PortfolioItem {
   positions: { [symbol: string]: Position };
   value: number;
 }
-
-export interface Position {
-  averagePrice: number;
-  currency: Currency;
-  firstBuyDate: string;
-  investment: number;
-  investmentInOriginalCurrency?: number;
-  marketPrice?: number;
-  quantity: number;
-  transactionCount: number;
-}
diff --git a/apps/api/src/app/portfolio/interfaces/portfolio-performance.interface.ts b/libs/helper/src/lib/interfaces/portfolio-performance.interface.ts
similarity index 100%
rename from apps/api/src/app/portfolio/interfaces/portfolio-performance.interface.ts
rename to libs/helper/src/lib/interfaces/portfolio-performance.interface.ts
diff --git a/libs/helper/src/lib/interfaces/position.interface.ts b/libs/helper/src/lib/interfaces/position.interface.ts
new file mode 100644
index 000000000..4094a0e79
--- /dev/null
+++ b/libs/helper/src/lib/interfaces/position.interface.ts
@@ -0,0 +1,12 @@
+import { Currency } from '@prisma/client';
+
+export interface Position {
+  averagePrice: number;
+  currency: Currency;
+  firstBuyDate: string;
+  investment: number;
+  investmentInOriginalCurrency?: number;
+  marketPrice?: number;
+  quantity: number;
+  transactionCount: number;
+}