diff --git a/apps/api/src/app/import/import.service.ts b/apps/api/src/app/import/import.service.ts
index 09f7da05f..5d3574fbf 100644
--- a/apps/api/src/app/import/import.service.ts
+++ b/apps/api/src/app/import/import.service.ts
@@ -536,7 +536,6 @@ export class ImportService {
 
     const assetProfilesToCreate: {
       assetProfile: Prisma.SymbolProfileCreateInput;
-      assetProfileIdentifier: string;
       marketDataObjects: Prisma.MarketDataUpdateInput[];
     }[] = [];
 
@@ -644,11 +643,7 @@ export class ImportService {
             // is known which activities are imported
             assetProfilesToCreate.push({
               marketDataObjects,
-              assetProfile: assetProfileToCreate,
-              assetProfileIdentifier: getAssetProfileIdentifier({
-                symbol,
-                dataSource: assetProfileWithMarketData.dataSource
-              })
+              assetProfile: assetProfileToCreate
             });
           } else {
             // Insert or update market data
@@ -738,35 +733,21 @@ export class ImportService {
       return id === TAG_ID_DRAFT;
     }) ?? { id: TAG_ID_DRAFT, name: 'DRAFT' };
 
-    if (assetProfilesToCreate.length) {
-      // Create the new asset profiles of the activities to import only, so
-      // that no unused asset profile remains, for example if an activity is a
-      // duplicate. An asset profile which is created before the validation of
-      // the activities would stay behind, because the import is not rolled
-      // back on an error.
-      const assetProfileIdentifiersToImport = new Set(
-        activitiesExtendedWithErrors
-          .filter(({ error }) => {
-            return !error;
-          })
-          .map(({ assetProfile }) => {
-            return getAssetProfileIdentifier(assetProfile);
-          })
-      );
-
-      for (const {
-        assetProfile,
-        assetProfileIdentifier,
-        marketDataObjects
-      } of assetProfilesToCreate) {
-        if (!assetProfileIdentifiersToImport.has(assetProfileIdentifier)) {
-          continue;
-        }
-
-        await this.symbolProfileService.add(assetProfile);
-
-        await this.marketDataService.updateMany({ data: marketDataObjects });
-      }
+    // Create the new asset profiles of the activities to import only, so that
+    // no unused asset profile remains, for example if an activity is a
+    // duplicate. An asset profile which is created before the validation of
+    // the activities would stay behind, because the import is not rolled back
+    // on an error.
+    for (const {
+      assetProfile,
+      marketDataObjects
+    } of this.getAssetProfilesToCreate({
+      activities: activitiesExtendedWithErrors,
+      assetProfiles: assetProfilesToCreate
+    })) {
+      await this.symbolProfileService.add(assetProfile);
+
+      await this.marketDataService.updateMany({ data: marketDataObjects });
     }
 
     const activities: Activity[] = [];
@@ -1105,6 +1086,39 @@ export class ImportService {
     return matchingAccountsOfUser[0];
   }
 
+  /**
+   * Returns the asset profiles which at least one activity of the import uses.
+   * The asset profiles are created after the validation of the activities,
+   * thus an asset profile of an activity which is not imported must not be
+   * created.
+   */
+  private getAssetProfilesToCreate({
+    activities,
+    assetProfiles
+  }: {
+    activities: Partial<Activity>[];
+    assetProfiles: {
+      assetProfile: Prisma.SymbolProfileCreateInput;
+      marketDataObjects: Prisma.MarketDataUpdateInput[];
+    }[];
+  }) {
+    const assetProfileIdentifiersToImport = new Set(
+      activities
+        .filter(({ error }) => {
+          return !error;
+        })
+        .map(({ assetProfile }) => {
+          return getAssetProfileIdentifier(assetProfile);
+        })
+    );
+
+    return assetProfiles.filter(({ assetProfile }) => {
+      return assetProfileIdentifiersToImport.has(
+        getAssetProfileIdentifier(assetProfile)
+      );
+    });
+  }
+
   private isUniqueAccount(accounts: AccountWithValue[]) {
     const uniqueAccountIds = new Set<string>();
 
diff --git a/apps/api/src/services/data-provider/data-provider.service.ts b/apps/api/src/services/data-provider/data-provider.service.ts
index 7e05dea49..102b80d56 100644
--- a/apps/api/src/services/data-provider/data-provider.service.ts
+++ b/apps/api/src/services/data-provider/data-provider.service.ts
@@ -39,7 +39,7 @@ import { Inject, Injectable, Logger, OnModuleInit } from '@nestjs/common';
 import { DataSource, MarketData, Prisma, SymbolProfile } from '@prisma/client';
 import { Big } from 'big.js';
 import { eachDayOfInterval, format, isValid } from 'date-fns';
-import { groupBy, isEmpty, isNumber, uniqWith } from 'lodash';
+import { groupBy, isEmpty, isNumber, omit, uniqWith } from 'lodash';
 import ms from 'ms';
 
 import { AssetProfileInvalidError } from './errors/asset-profile-invalid.error';
@@ -272,19 +272,22 @@ export class DataProviderService implements OnModuleInit {
       });
 
       if (!assetProfiles[assetProfileIdentifier]) {
+        const assetProfileInImport = assetProfilesWithMarketDataDto?.find(
+          (assetProfile) => {
+            return (
+              assetProfile.dataSource === dataSource &&
+              assetProfile.symbol === symbol
+            );
+          }
+        );
+
+        // A custom asset profile of the import is created after the
+        // validation, thus the data provider cannot resolve it yet
         if (
-          (dataSource === DataSource.MANUAL && type === 'BUY') ||
+          (dataSource === DataSource.MANUAL &&
+            (type === 'BUY' || Boolean(assetProfileInImport))) ||
           NON_INVESTMENT_ACTIVITY_TYPES.includes(type)
         ) {
-          const assetProfileInImport = assetProfilesWithMarketDataDto?.find(
-            (assetProfile) => {
-              return (
-                assetProfile.dataSource === dataSource &&
-                assetProfile.symbol === symbol
-              );
-            }
-          );
-
           assetProfiles[assetProfileIdentifier] = {
             currency,
             dataSource,
@@ -309,18 +312,10 @@ export class DataProviderService implements OnModuleInit {
             )?.[assetProfileIdentifier] ?? assetProfile;
         } catch {}
 
-        if (!assetProfile?.name) {
-          const assetProfileInImport = assetProfilesWithMarketDataDto?.find(
-            (profile) => {
-              return (
-                profile.dataSource === dataSource && profile.symbol === symbol
-              );
-            }
-          );
-
-          if (assetProfileInImport) {
-            Object.assign(assetProfile, assetProfileInImport);
-          }
+        if (!assetProfile?.name && assetProfileInImport) {
+          // Omit the market data, since it must not become part of the
+          // asset profile of the response
+          Object.assign(assetProfile, omit(assetProfileInImport, 'marketData'));
         }
 
         if (!assetProfile?.name) {