diff --git a/packages/backend/src/chat/like.service.ts b/packages/backend/src/chat/like.service.ts
index a1495905..bead22b3 100644
--- a/packages/backend/src/chat/like.service.ts
+++ b/packages/backend/src/chat/like.service.ts
@@ -1,4 +1,5 @@
 import { BadRequestException, Injectable } from '@nestjs/common';
+import { Cron } from '@nestjs/schedule';
 import { DataSource, EntityManager } from 'typeorm';
 import { Chat } from '@/chat/domain/chat.entity';
 import { Like } from '@/chat/domain/like.entity';
@@ -6,6 +7,8 @@ import { LikeResponse } from '@/chat/dto/like.response';
 
 @Injectable()
 export class LikeService {
+  private readonly likedChats = new Set<number>();
+
   constructor(private readonly dataSource: DataSource) {}
 
   async toggleLike(userId: number, chatId: number) {
@@ -14,6 +17,7 @@ export class LikeService {
       const like = await manager.findOne(Like, {
         where: { user: { id: userId }, chat: { id: chatId } },
       });
+      this.likedChats.add(chatId);
       if (like) {
         return await this.deleteLike(manager, chat, like);
       }
@@ -21,6 +25,24 @@ export class LikeService {
     });
   }
 
+  @Cron('*/30 * * * *')
+  async calculateLike() {
+    const tasks = [];
+    for (const chatId of this.likedChats) {
+      tasks.push(async () => {
+        const likeCount = await this.dataSource
+          .getRepository(Like)
+          .createQueryBuilder('like')
+          .where('like.chat_id = :chatId', { chatId })
+          .getCount();
+
+        await this.dataSource.getRepository(Chat).update(chatId, { likeCount });
+      });
+    }
+    await Promise.all(tasks.map((task) => task()));
+    this.likedChats.clear();
+  }
+
   private async findChat(chatId: number, manager: EntityManager) {
     const chat = await manager.findOne(Chat, {
       where: { id: chatId },
diff --git a/packages/backend/src/common/cache/localCache.ts b/packages/backend/src/common/cache/localCache.ts
index 03a7a6fb..b28aec1d 100644
--- a/packages/backend/src/common/cache/localCache.ts
+++ b/packages/backend/src/common/cache/localCache.ts
@@ -16,7 +16,7 @@ export class LocalCache<K, V> {
     new PriorityQueue();
 
   constructor(private readonly interval = 500) {
-    setInterval(() => this.clearExpired(), interval);
+    setInterval(() => this.clearExpired(), this.interval);
   }
 
   get(key: K) {
diff --git a/packages/backend/src/stock/cache/stockData.cache.ts b/packages/backend/src/stock/cache/stockData.cache.ts
index 5a1ea479..5158f473 100644
--- a/packages/backend/src/stock/cache/stockData.cache.ts
+++ b/packages/backend/src/stock/cache/stockData.cache.ts
@@ -1,16 +1,16 @@
 import { Injectable } from '@nestjs/common';
 import { LocalCache } from '@/common/cache/localCache';
-import { StockDataResponse } from '@/stock/dto/stockData.response';
+import { StockData } from '@/stock/domain/stockData.entity';
 
 @Injectable()
 export class StockDataCache {
-  private readonly localCache = new LocalCache<string, StockDataResponse>();
+  private readonly localCache = new LocalCache<string, StockData[]>();
 
-  set(key: string, value: StockDataResponse, ttl: number = 60000) {
+  set(key: string, value: StockData[], ttl: number = 60000) {
     this.localCache.set(key, value, ttl);
   }
 
-  get(key: string): StockDataResponse | null {
+  get(key: string): StockData[] | null {
     return this.localCache.get(key);
   }
 }
diff --git a/packages/backend/src/stock/dto/stockData.response.ts b/packages/backend/src/stock/dto/stockData.response.ts
index f251aa6d..09b9d643 100644
--- a/packages/backend/src/stock/dto/stockData.response.ts
+++ b/packages/backend/src/stock/dto/stockData.response.ts
@@ -21,32 +21,32 @@ export class PriceDto {
     description: '시가',
     example: '121.00',
   })
-  open: number;
+  open: string;
 
   @ApiProperty({
     description: '고가',
     example: '125.00',
   })
-  high: number;
+  high: string;
 
   @ApiProperty({
     description: '저가',
     example: '120.00',
   })
-  low: number;
+  low: string;
 
   @ApiProperty({
     description: '종가',
     example: '123.45',
   })
-  close: number;
+  close: string;
 
   constructor(stockData: StockData) {
     this.startTime = stockData.startTime;
-    this.open = stockData.open;
-    this.high = stockData.high;
-    this.low = stockData.low;
-    this.close = stockData.close;
+    this.open = String(stockData.open);
+    this.high = String(stockData.high);
+    this.low = String(stockData.low);
+    this.close = String(stockData.close);
   }
 }
 
@@ -104,20 +104,36 @@ export class StockDataResponse {
 
   renewLastData(stockLiveData: StockLiveData, entity: new () => StockData) {
     const lastIndex = this.priceDtoList.length - 1;
-    this.priceDtoList[lastIndex].close = stockLiveData.currentPrice;
+    this.priceDtoList[lastIndex].close = String(stockLiveData.currentPrice);
+    this.renewHighLow(stockLiveData, lastIndex);
+    this.renewVolume(stockLiveData, lastIndex, entity);
+    this.renewStartTime(entity, lastIndex);
+  }
+
+  private renewStartTime(entity: new () => StockData, lastIndex: number) {
+    if (entity !== StockWeekly) {
+      this.priceDtoList[lastIndex].startTime = getToday();
+      this.volumeDtoList[lastIndex].startTime = getToday();
+      return;
+    }
+  }
+
+  private renewHighLow(stockLiveData: StockLiveData, lastIndex: number) {
     this.priceDtoList[lastIndex].high =
       Number(stockLiveData.high) > Number(this.priceDtoList[lastIndex].high)
-        ? stockLiveData.high
-        : this.priceDtoList[lastIndex].high;
+        ? String(stockLiveData.high)
+        : String(this.priceDtoList[lastIndex].high);
     this.priceDtoList[lastIndex].low =
       Number(stockLiveData.low) < Number(this.priceDtoList[lastIndex].low)
-        ? stockLiveData.low
-        : this.priceDtoList[lastIndex].low;
+        ? String(stockLiveData.low)
+        : String(this.priceDtoList[lastIndex].low);
+  }
 
-    this.priceDtoList[lastIndex].startTime =
-      entity !== StockWeekly
-        ? getToday()
-        : this.priceDtoList[lastIndex].startTime;
+  private renewVolume(
+    stockLiveData: StockLiveData,
+    lastIndex: number,
+    entity: new () => StockData,
+  ) {
     this.volumeDtoList[lastIndex].volume =
       entity === StockDaily
         ? String(stockLiveData.volume)
diff --git a/packages/backend/src/stock/stockData.service.ts b/packages/backend/src/stock/stockData.service.ts
index 3527b240..ec3dbd8a 100644
--- a/packages/backend/src/stock/stockData.service.ts
+++ b/packages/backend/src/stock/stockData.service.ts
@@ -56,10 +56,20 @@ export class StockDataService {
     const cachedData = this.stockDataCache.get(cacheKey);
 
     if (cachedData) {
-      return cachedData;
+      const time = new Date();
+      const response = this.convertResultsToResponse(cachedData);
+      if (!lastStartTime && time.getHours() < 16 && time.getHours() >= 9) {
+        return await this.renewResponse(response, entity, stockId);
+      }
+      return response;
+    }
+    const results = await this.getChartData(entity, stockId, lastStartTime);
+    this.stockDataCache.set(cacheKey, results);
+    const response = this.convertResultsToResponse(results);
+    const time = new Date();
+    if (!lastStartTime && time.getHours() < 16 && time.getHours() >= 9) {
+      return await this.renewResponse(response, entity, stockId);
     }
-    const response = await this.getChartData(entity, stockId, lastStartTime);
-    this.stockDataCache.set(cacheKey, response);
     return response;
   }
 
@@ -69,7 +79,7 @@ export class StockDataService {
     periodType: Period,
     lastStartTime?: string,
   ) {
-    return new Promise<StockDataResponse>((resolve) => {
+    return new Promise<StockData[]>((resolve) => {
       this.openapiPeriodData.insertCartDataRequest(
         this.getHandleResponseCallback(entity, stockId, resolve, lastStartTime),
         stockId,
@@ -109,16 +119,7 @@ export class StockDataService {
         lastStartTime,
       );
     }
-    const response = await this.getChartDataFromDB(
-      entity,
-      stockId,
-      lastStartTime,
-    );
-    const time = new Date();
-    if (!lastStartTime && time.getHours() < 16 && time.getHours() >= 9) {
-      return await this.renewResponse(response, entity, stockId);
-    }
-    return response;
+    return await this.getChartDataFromDB(entity, stockId, lastStartTime);
   }
 
   private async renewResponse(
@@ -146,14 +147,13 @@ export class StockDataService {
       this.dataSource.manager,
       lastStartTime,
     );
-    const results = await queryBuilder.getMany();
-    return this.convertResultsToResponse(results);
+    return await queryBuilder.getMany();
   }
 
   private getHandleResponseCallback(
     entity: new () => StockData,
     stockId: string,
-    resolve: (value: StockDataResponse) => void,
+    resolve: (value: StockData[]) => void,
     lastStartTime?: string,
   ) {
     return async () => {