diff --git a/apps/api/src/app/account-balance/account-balance.controller.ts b/apps/api/src/app/account-balance/account-balance.controller.ts
index 4a8412003..bc454c5ab 100644
--- a/apps/api/src/app/account-balance/account-balance.controller.ts
+++ b/apps/api/src/app/account-balance/account-balance.controller.ts
@@ -1,7 +1,6 @@
 import { AccountService } from '@ghostfolio/api/app/account/account.service';
 import { HasPermission } from '@ghostfolio/api/decorators/has-permission.decorator';
 import { HasPermissionGuard } from '@ghostfolio/api/guards/has-permission.guard';
-import { resetHours } from '@ghostfolio/common/helper';
 import { permissions } from '@ghostfolio/common/permissions';
 import type { RequestWithUser } from '@ghostfolio/common/types';
 
@@ -18,7 +17,6 @@ import {
 import { REQUEST } from '@nestjs/core';
 import { AuthGuard } from '@nestjs/passport';
 import { AccountBalance } from '@prisma/client';
-import { parseISO } from 'date-fns';
 import { StatusCodes, getReasonPhrase } from 'http-status-codes';
 
 import { AccountBalanceService } from './account-balance.service';
@@ -67,10 +65,11 @@ export class AccountBalanceController {
     @Param('id') id: string
   ): Promise<AccountBalance> {
     const accountBalance = await this.accountBalanceService.accountBalance({
-      id
+      id,
+      userId: this.request.user.id
     });
 
-    if (!accountBalance || accountBalance.userId !== this.request.user.id) {
+    if (!accountBalance) {
       throw new HttpException(
         getReasonPhrase(StatusCodes.FORBIDDEN),
         StatusCodes.FORBIDDEN
@@ -78,7 +77,8 @@ export class AccountBalanceController {
     }
 
     return this.accountBalanceService.deleteAccountBalance({
-      id
+      id: accountBalance.id,
+      userId: accountBalance.userId
     });
   }
 }
diff --git a/apps/api/src/app/account-balance/account-balance.service.ts b/apps/api/src/app/account-balance/account-balance.service.ts
index 5a5ec5be0..65393cec8 100644
--- a/apps/api/src/app/account-balance/account-balance.service.ts
+++ b/apps/api/src/app/account-balance/account-balance.service.ts
@@ -1,3 +1,4 @@
+import { PortfolioChangedEvent } from '@ghostfolio/api/events/portfolio-changed.event';
 import { ExchangeRateDataService } from '@ghostfolio/api/services/exchange-rate-data/exchange-rate-data.service';
 import { PrismaService } from '@ghostfolio/api/services/prisma/prisma.service';
 import { resetHours } from '@ghostfolio/common/helper';
@@ -5,6 +6,7 @@ import { AccountBalancesResponse, Filter } from '@ghostfolio/common/interfaces';
 import { UserWithSettings } from '@ghostfolio/common/types';
 
 import { Injectable } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import { AccountBalance, Prisma } from '@prisma/client';
 import { parseISO } from 'date-fns';
 
@@ -13,6 +15,7 @@ import { CreateAccountBalanceDto } from './create-account-balance.dto';
 @Injectable()
 export class AccountBalanceService {
   public constructor(
+    private readonly eventEmitter: EventEmitter2,
     private readonly exchangeRateDataService: ExchangeRateDataService,
     private readonly prismaService: PrismaService
   ) {}
@@ -36,7 +39,7 @@ export class AccountBalanceService {
   }: CreateAccountBalanceDto & {
     userId: string;
   }): Promise<AccountBalance> {
-    return this.prismaService.accountBalance.upsert({
+    const accountBalance = await this.prismaService.accountBalance.upsert({
       create: {
         Account: {
           connect: {
@@ -59,14 +62,32 @@ export class AccountBalanceService {
         }
       }
     });
+
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId
+      })
+    );
+
+    return accountBalance;
   }
 
   public async deleteAccountBalance(
     where: Prisma.AccountBalanceWhereUniqueInput
   ): Promise<AccountBalance> {
-    return this.prismaService.accountBalance.delete({
+    const accountBalance = await this.prismaService.accountBalance.delete({
       where
     });
+
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId: <string>where.userId
+      })
+    );
+
+    return accountBalance;
   }
 
   public async getAccountBalances({
diff --git a/apps/api/src/app/account/account.service.ts b/apps/api/src/app/account/account.service.ts
index 6be7e8ffb..1564fa5b3 100644
--- a/apps/api/src/app/account/account.service.ts
+++ b/apps/api/src/app/account/account.service.ts
@@ -1,10 +1,12 @@
 import { AccountBalanceService } from '@ghostfolio/api/app/account-balance/account-balance.service';
+import { PortfolioChangedEvent } from '@ghostfolio/api/events/portfolio-changed.event';
 import { ExchangeRateDataService } from '@ghostfolio/api/services/exchange-rate-data/exchange-rate-data.service';
 import { PrismaService } from '@ghostfolio/api/services/prisma/prisma.service';
 import { DATE_FORMAT } from '@ghostfolio/common/helper';
 import { Filter } from '@ghostfolio/common/interfaces';
 
 import { Injectable } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import { Account, Order, Platform, Prisma } from '@prisma/client';
 import { Big } from 'big.js';
 import { format } from 'date-fns';
@@ -16,6 +18,7 @@ import { CashDetails } from './interfaces/cash-details.interface';
 export class AccountService {
   public constructor(
     private readonly accountBalanceService: AccountBalanceService,
+    private readonly eventEmitter: EventEmitter2,
     private readonly exchangeRateDataService: ExchangeRateDataService,
     private readonly prismaService: PrismaService
   ) {}
@@ -94,6 +97,13 @@ export class AccountService {
       userId: aUserId
     });
 
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId: account.userId
+      })
+    );
+
     return account;
   }
 
@@ -101,9 +111,18 @@ export class AccountService {
     where: Prisma.AccountWhereUniqueInput,
     aUserId: string
   ): Promise<Account> {
-    return this.prismaService.account.delete({
+    const account = await this.prismaService.account.delete({
       where
     });
+
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId: account.userId
+      })
+    );
+
+    return account;
   }
 
   public async getAccounts(aUserId: string): Promise<Account[]> {
@@ -201,10 +220,19 @@ export class AccountService {
       userId: aUserId
     });
 
-    return this.prismaService.account.update({
+    const account = await this.prismaService.account.update({
       data,
       where
     });
+
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId: account.userId
+      })
+    );
+
+    return account;
   }
 
   public async updateAccountBalance({
diff --git a/apps/api/src/app/app.module.ts b/apps/api/src/app/app.module.ts
index 5f2be5c8e..67bb9e03c 100644
--- a/apps/api/src/app/app.module.ts
+++ b/apps/api/src/app/app.module.ts
@@ -1,3 +1,4 @@
+import { EventsModule } from '@ghostfolio/api/events/events.module';
 import { ConfigurationModule } from '@ghostfolio/api/services/configuration/configuration.module';
 import { CronService } from '@ghostfolio/api/services/cron.service';
 import { DataGatheringModule } from '@ghostfolio/api/services/data-gathering/data-gathering.module';
@@ -14,6 +15,7 @@ import {
 import { BullModule } from '@nestjs/bull';
 import { Module } from '@nestjs/common';
 import { ConfigModule } from '@nestjs/config';
+import { EventEmitterModule } from '@nestjs/event-emitter';
 import { ScheduleModule } from '@nestjs/schedule';
 import { ServeStaticModule } from '@nestjs/serve-static';
 import { StatusCodes } from 'http-status-codes';
@@ -44,6 +46,7 @@ import { TagModule } from './tag/tag.module';
 import { UserModule } from './user/user.module';
 
 @Module({
+  controllers: [AppController],
   imports: [
     AdminModule,
     AccessModule,
@@ -64,6 +67,8 @@ import { UserModule } from './user/user.module';
     ConfigurationModule,
     DataGatheringModule,
     DataProviderModule,
+    EventEmitterModule.forRoot(),
+    EventsModule,
     ExchangeRateModule,
     ExchangeRateDataModule,
     ExportModule,
@@ -109,7 +114,6 @@ import { UserModule } from './user/user.module';
     TwitterBotModule,
     UserModule
   ],
-  controllers: [AppController],
   providers: [CronService]
 })
 export class AppModule {}
diff --git a/apps/api/src/app/order/order.controller.ts b/apps/api/src/app/order/order.controller.ts
index 3dadedcaf..4a85dce57 100644
--- a/apps/api/src/app/order/order.controller.ts
+++ b/apps/api/src/app/order/order.controller.ts
@@ -60,15 +60,15 @@ export class OrderController {
   }
 
   @Delete(':id')
+  @HasPermission(permissions.deleteOrder)
   @UseGuards(AuthGuard('jwt'), HasPermissionGuard)
   public async deleteOrder(@Param('id') id: string): Promise<OrderModel> {
-    const order = await this.orderService.order({ id });
+    const order = await this.orderService.order({
+      id,
+      userId: this.request.user.id
+    });
 
-    if (
-      !hasPermission(this.request.user.permissions, permissions.deleteOrder) ||
-      !order ||
-      order.userId !== this.request.user.id
-    ) {
+    if (!order) {
       throw new HttpException(
         getReasonPhrase(StatusCodes.FORBIDDEN),
         StatusCodes.FORBIDDEN
diff --git a/apps/api/src/app/order/order.service.ts b/apps/api/src/app/order/order.service.ts
index 35bfa1bcf..a78daa143 100644
--- a/apps/api/src/app/order/order.service.ts
+++ b/apps/api/src/app/order/order.service.ts
@@ -1,4 +1,5 @@
 import { AccountService } from '@ghostfolio/api/app/account/account.service';
+import { PortfolioChangedEvent } from '@ghostfolio/api/events/portfolio-changed.event';
 import { DataGatheringService } from '@ghostfolio/api/services/data-gathering/data-gathering.service';
 import { ExchangeRateDataService } from '@ghostfolio/api/services/exchange-rate-data/exchange-rate-data.service';
 import { PrismaService } from '@ghostfolio/api/services/prisma/prisma.service';
@@ -13,6 +14,7 @@ import { Filter, UniqueAsset } from '@ghostfolio/common/interfaces';
 import { OrderWithAccount } from '@ghostfolio/common/types';
 
 import { Injectable } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import {
   AssetClass,
   AssetSubClass,
@@ -27,7 +29,6 @@ import { endOfToday, isAfter } from 'date-fns';
 import { groupBy, uniqBy } from 'lodash';
 import { v4 as uuidv4 } from 'uuid';
 
-import { CreateOrderDto } from './create-order.dto';
 import { Activities } from './interfaces/activities.interface';
 
 @Injectable()
@@ -35,6 +36,7 @@ export class OrderService {
   public constructor(
     private readonly accountService: AccountService,
     private readonly dataGatheringService: DataGatheringService,
+    private readonly eventEmitter: EventEmitter2,
     private readonly exchangeRateDataService: ExchangeRateDataService,
     private readonly prismaService: PrismaService,
     private readonly symbolProfileService: SymbolProfileService
@@ -160,6 +162,13 @@ export class OrderService {
       });
     }
 
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId: order.userId
+      })
+    );
+
     return order;
   }
 
@@ -174,6 +183,13 @@ export class OrderService {
       await this.symbolProfileService.deleteById(order.symbolProfileId);
     }
 
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId: order.userId
+      })
+    );
+
     return order;
   }
 
@@ -182,6 +198,13 @@ export class OrderService {
       where
     });
 
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId: <string>where.userId
+      })
+    );
+
     return count;
   }
 
@@ -455,7 +478,7 @@ export class OrderService {
       where
     });
 
-    return this.prismaService.order.update({
+    const order = await this.prismaService.order.update({
       data: {
         ...data,
         isDraft,
@@ -467,6 +490,15 @@ export class OrderService {
       },
       where
     });
+
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId: order.userId
+      })
+    );
+
+    return order;
   }
 
   private async orders(params: {
diff --git a/apps/api/src/app/user/user.service.ts b/apps/api/src/app/user/user.service.ts
index 4cc60770f..3a370d88a 100644
--- a/apps/api/src/app/user/user.service.ts
+++ b/apps/api/src/app/user/user.service.ts
@@ -1,5 +1,6 @@
 import { SubscriptionService } from '@ghostfolio/api/app/subscription/subscription.service';
 import { environment } from '@ghostfolio/api/environments/environment';
+import { PortfolioChangedEvent } from '@ghostfolio/api/events/portfolio-changed.event';
 import { ConfigurationService } from '@ghostfolio/api/services/configuration/configuration.service';
 import { I18nService } from '@ghostfolio/api/services/i18n/i18n.service';
 import { PrismaService } from '@ghostfolio/api/services/prisma/prisma.service';
@@ -25,6 +26,7 @@ import {
 import { UserWithSettings } from '@ghostfolio/common/types';
 
 import { Injectable } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import { Prisma, Role, User } from '@prisma/client';
 import { differenceInDays } from 'date-fns';
 import { sortBy, without } from 'lodash';
@@ -37,6 +39,7 @@ export class UserService {
 
   public constructor(
     private readonly configurationService: ConfigurationService,
+    private readonly eventEmitter: EventEmitter2,
     private readonly prismaService: PrismaService,
     private readonly propertyService: PropertyService,
     private readonly subscriptionService: SubscriptionService,
@@ -437,11 +440,9 @@ export class UserService {
     userId: string;
     userSettings: UserSettings;
   }) {
-    const settings = userSettings as unknown as Prisma.JsonObject;
-
-    await this.prismaService.settings.upsert({
+    const { settings } = await this.prismaService.settings.upsert({
       create: {
-        settings,
+        settings: userSettings as unknown as Prisma.JsonObject,
         User: {
           connect: {
             id: userId
@@ -449,14 +450,21 @@ export class UserService {
         }
       },
       update: {
-        settings
+        settings: userSettings as unknown as Prisma.JsonObject
       },
       where: {
         userId
       }
     });
 
-    return;
+    this.eventEmitter.emit(
+      PortfolioChangedEvent.getName(),
+      new PortfolioChangedEvent({
+        userId
+      })
+    );
+
+    return settings;
   }
 
   private getRandomString(length: number) {
diff --git a/apps/api/src/events/events.module.ts b/apps/api/src/events/events.module.ts
new file mode 100644
index 000000000..bf9708f4b
--- /dev/null
+++ b/apps/api/src/events/events.module.ts
@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+
+import { PortfolioChangedListener } from './portfolio-changed.listener';
+
+@Module({
+  providers: [PortfolioChangedListener]
+})
+export class EventsModule {}
diff --git a/apps/api/src/events/portfolio-changed.event.ts b/apps/api/src/events/portfolio-changed.event.ts
new file mode 100644
index 000000000..a3b0710fb
--- /dev/null
+++ b/apps/api/src/events/portfolio-changed.event.ts
@@ -0,0 +1,15 @@
+export class PortfolioChangedEvent {
+  private userId: string;
+
+  public constructor({ userId }: { userId: string }) {
+    this.userId = userId;
+  }
+
+  public static getName() {
+    return 'portfolio.changed';
+  }
+
+  public getUserId() {
+    return this.userId;
+  }
+}
diff --git a/apps/api/src/events/portfolio-changed.listener.ts b/apps/api/src/events/portfolio-changed.listener.ts
new file mode 100644
index 000000000..3dd856084
--- /dev/null
+++ b/apps/api/src/events/portfolio-changed.listener.ts
@@ -0,0 +1,15 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+
+import { PortfolioChangedEvent } from './portfolio-changed.event';
+
+@Injectable()
+export class PortfolioChangedListener {
+  @OnEvent(PortfolioChangedEvent.getName())
+  handlePortfolioChangedEvent(event: PortfolioChangedEvent) {
+    Logger.log(
+      `Portfolio of user with id ${event.getUserId()} has changed`,
+      'PortfolioChangedListener'
+    );
+  }
+}
diff --git a/package.json b/package.json
index 8b036f588..690918edf 100644
--- a/package.json
+++ b/package.json
@@ -78,6 +78,7 @@
     "@nestjs/common": "10.1.3",
     "@nestjs/config": "3.0.0",
     "@nestjs/core": "10.1.3",
+    "@nestjs/event-emitter": "2.0.4",
     "@nestjs/jwt": "10.1.0",
     "@nestjs/passport": "10.0.0",
     "@nestjs/platform-express": "10.1.3",
diff --git a/yarn.lock b/yarn.lock
index 5dd3bcd98..f5fd0d164 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4814,6 +4814,13 @@
     path-to-regexp "3.2.0"
     tslib "2.6.1"
 
+"@nestjs/event-emitter@2.0.4":
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/@nestjs/event-emitter/-/event-emitter-2.0.4.tgz#de7d3986cfeb82639bb95181fab4fe5525437c74"
+  integrity sha512-quMiw8yOwoSul0pp3mOonGz8EyXWHSBTqBy8B0TbYYgpnG1Ix2wGUnuTksLWaaBiiOTDhciaZ41Y5fJZsSJE1Q==
+  dependencies:
+    eventemitter2 "6.4.9"
+
 "@nestjs/jwt@10.1.0":
   version "10.1.0"
   resolved "https://registry.yarnpkg.com/@nestjs/jwt/-/jwt-10.1.0.tgz#7899b68d68b998cc140bc0af392c63fc00755236"
@@ -11653,7 +11660,7 @@ event-target-shim@^5.0.0:
   resolved "https://registry.yarnpkg.com/event-target-shim/-/event-target-shim-5.0.1.tgz#5d4d3ebdf9583d63a5333ce2deb7480ab2b05789"
   integrity sha512-i/2XbnSz/uxRCU6+NdVJgKWDTM427+MqYbkQzD321DuCQJUqOuJKIA0IM2+W2xtYHdKOmZ4dR6fExsd4SXL+WQ==
 
-eventemitter2@^6.4.2:
+eventemitter2@6.4.9, eventemitter2@^6.4.2:
   version "6.4.9"
   resolved "https://registry.yarnpkg.com/eventemitter2/-/eventemitter2-6.4.9.tgz#41f2750781b4230ed58827bc119d293471ecb125"
   integrity sha512-JEPTiaOt9f04oa6NOkc4aH+nVp5I3wEjpHbIPqfgCdD5v5bUzy7xQqwcVO2aDQgOWhI28da57HksMrzK9HlRxg==