diff --git a/backend.js b/backend.js
index e595cba..5bec3f8 100644
--- a/backend.js
+++ b/backend.js
@@ -3,19 +3,17 @@
 let user = {
     /*
     user_name,
-    stock_list
-    */
-};
-let stock = {
-    /*
     stock_name,
     stock_amount,
     stock_price,
+    total,
+    current_price,
+    margin
     */
 };
+
 //localStorage에 저장하는 key도 user_list로 저장
 let user_list = [];
-let stock_list = [];
 
 //save data
 function saveInfo() {
@@ -36,25 +34,26 @@ window.addEventListener("load", () => {
 });
 
 //정보 조회 (버튼 = #search, input _text = #name)
-function selectData(name) {
-    let target = user_list.filter((t) => {
-        t["user_name"] === name;
-    });
-    return target;
+function getIndex(name) {
+    let idx = user_list.findIndex((obj) => obj.user_name === name);
+    return idx;
 }
 
-//한 사람당 여러 주식 갖도록 바꾸면 이 함수도 변경해야 함
-function getMargin(user, current_price) {
-    let amount = parseInt(user["stock_amount"]);
-    let old_price = parseInt(user["stock_price"]);
-    let diff = current_price - old_price;
-    return diff * amount;
+function getCurrentPrice(obj) {}
+
+function getMarginSearch(user) {
+    let price = parseInt(user["current_price"]);
+    let amount = parseInt(user.stock_amount);
+    let avg_price = parseInt(user.total) / amount;
+    let margin = (price - avg_price) * amount;
+    return margin;
 }
 
-function addSpanChild(div, user_key) {
+function addSpanChild(div, idx) {
+    let target = user_list[idx];
     let child = document.createElement("span");
-    child.className = "me-1 mb-2 mt-2";
-    child.textContent = data[user_key];
+    child.className = "me-4";
+    child.textContent = `${target["user_name"]}님의 주식 ${target["stock_name"]}의 정보: 현재 가격은 ${target["current_price"]}, 수익금은 ${target["margin"]}입니다.`;
     div.appendChild(child);
 }
 
@@ -69,23 +68,29 @@ button_search.addEventListener("click", () => {
         return;
     }
 
-    let data = selectData(name);
-    let current_price;
-    //let margin = getMargin(data, current_price);
-    //data["margin"] = margin;
+    let s_idx = getIndex(name);
+    let current_price = getCurrentPrice(user_list[s_idx]);
+    user_list[s_idx]["current_price"] = current_price;
+    let margin = getMarginSearch(user_list[s_idx]);
+    user_list[s_idx]["margin"] = margin;
 
     //html document element 만들고 추가
     let div = document.createElement("div");
-    div.className = "d-flex-grow-1 align-items-center bg-light rounded-2 p-2";
-
-    addSpanChild(div, "user_name");
-    addSpanChild(div, "stock_name");
-    addSpanChild(div, "stock_amount");
-    addSpanChild(div, "stock_price");
-    addSpanChild(div, "stock_margin");
+    div.className =
+        "d-flex-grow-1 align-items-center bg-light rounded-2 p-2 outer";
+    addSpanChild(div, s_idx);
 
     let show_area = document.querySelector("#info");
     show_area.appendChild(div);
+
+    let buttonRemove = document.createElement("button");
+    buttonRemove.className = "btn btn-sm btn-danger";
+    buttonRemove.innerHTML = '<i class="bi bi-x"></i>';
+    div.appendChild(buttonRemove);
+
+    buttonRemove.addEventListener("click", () => {
+        div.remove();
+    });
 });
 
 //정보추가 버튼 - #new_add
@@ -123,24 +128,43 @@ button_newadd.addEventListener("click", () => {
     //console.log(user_list);
 });
 
+function getMarginAmend(user, price, change) {
+    change = -change;
+    let avg_price = parseInt(user.total) / parseInt(user.stock_amount);
+    let margin = (price - avg_price) * change;
+    return margin;
+}
+
 //정보갱신
 let button_existadd = document.querySelector("#exist_add");
 button_existadd.addEventListener("click", () => {
-    let name = getData("#exist_name");
+    let getname = getData("#exist_name");
     let stname = getData("#exist_stname");
     let change = parseInt(getData("#stock_change"));
     let price = parseInt(getData("#exist_stprice"));
 
-    let t_idx = user_list.findIndex((obj) => obj.user_name === name);
+    //매수/매도량에 0을 입력하면 데이터 삭제
+    if (change === 0) {
+        user_list = user_list.filter((obj) => obj["user_name"] !== getname);
+        saveInfo();
+        console.log(user_list);
+        return;
+    }
+
+    if (price === 0) {
+        price = parseInt(user["current_price"]);
+    } else {
+        price = parseInt(user["stock_price"]);
+    }
+
+    let t_idx = getIndex(getname);
     let original_amount = parseInt(user_list[t_idx].stock_amount);
 
     if (change < 0) {
-        let avg_price = user_list[t_idx].total / user_list[t_idx].stock_amount;
-        let margin = (price - avg_price) * change;
-    } else {
-        user_list[t_idx].total += change * price;
+        let margin = getMarginAmend(user_list[t_idx], price, change);
     }
+    user_list[t_idx].total += change * price;
     user_list[t_idx].stock_amount = original_amount + change;
 
-    let open = window.open("./window.html");
+    //let open = window.open("./window.html");
 });
diff --git a/index.html b/index.html
index 750de25..5b63de1 100644
--- a/index.html
+++ b/index.html
@@ -21,9 +21,9 @@
             .container {
                 width: 720px;
             }
+            
         </style>
     </head>
-+
     <body>
         <!-- HTML Code -->
         <nav class="navbar navbar-light bg-primary">