Bi Quyet Quan Ly Von Kelly Criterion – Cong Thuc Toan Hoc Giup Ban Danh Bai Nha Cai Long Dai

1. Tai sao quan ly von moi la yeu to quyet dinh su song con trong ca cuoc?

Trong the gioi ca cuoc bong da, 90% nguoi choi that bai khong phai vi ho khong biet cach soi keo, ma la vi ho khong biet cach quan ly tien von cua minh. Mot nguoi choi du co kha nang du doan chinh xac den 70% so tran dau nhung neu quan ly von sai lam, dat cuoc theo cam tinh "tran an thi danh it, tran thua thi danh nhieu" hoac ap dung tam ly go gac, tat tay (All-in) thi som muon cung se doi mat voi canh trang tay.

De tro thanh mot nha dau tu the thao chuyen nghiep tai Bongdata, ban can phai thay doi tu duy: bien ca cuoc tu mot tro choi may rui thanh mot hoat dong dau tu tai chinh nghiem tuc. Va trong so cac cong cu quan ly von hien dai duoc cac quy dau tu pho Wall va cac tay choi ca cuoc huyen thoai tren the gioi ap dung, Cong thuc Kelly (Kelly Criterion) chinh la chiec chia khoa vang giup ban toi uu hoa loi nhuan toi da trong khi triet tieu nguy co pha san.

2. Ban chat toan hoc cua Cong thuc Kelly Criterion

Cong thuc Kelly duoc phat trien boi nha toan hoc John L. Kelly Jr. vao nam 1956. Ban chat cua cong thuc nay la giup nguoi choi xac dinh chinh xac ty le phan tram so von nen dat cuoc vao mot cua dua tren hai yeu to: Ty le cuoc (Odds) cua nha cai va Xac suat chien thang thuc te ma ban tu tinh toan duoc.

Cong thuc toan hoc chuan cua Kelly duoc phat bieu nhu sau:

$$f^* = \frac{b \times p - q}{b}$$

Trong do:

$f^*$ (Kelly %): Ty le phan tram cua tong so von hien tai ma ban nen dung de dat cuoc cho tran dau do.

$b$ (Odds he so): Ty le cuoc rong ma ban nhan duoc tu nha cai (bang Odds Chau Au tru di 1). Vi du nha cai dua ra Odds la 2.10, thi $b = 2.10 - 1 = 1.10$.

$p$ (Probability): Xac suat chien thang cua cua cuoc do ban phan tich va nhan dinh (tinh theo dang thap phan tu 0 den 1).

$q$ (Loss Probability): Xac suat thua cuoc, duoc tinh bang cong thuc don gian: $q = 1 - p$.

3. Huong dan ung dung thuc te cong thuc Kelly tai BONGDATA

Hay cung di vao mot vi du thuc te de ban de dang hinh dung cach van hanh cua cong thuc nay:

Gia su ban dang theo doi tran dau giua Real Madrid va Barcelona. Nha cai dua ra keo Chau Au cho cua Real Madrid thang voi muc Odds la 2.0 (tuc la he so rong $b = 2.0 - 1 = 1.0$).

Bang cong cu phan tich du lieu chuyen sau tai BONGDATA (phong do, luc luong, loi the san nha), ban tu tin nhan dinh xac suat thang cua Real Madrid len toi 55% ($p = 0.55$). Nhu vay, xac suat thua cua cua nay se la 45% ($q = 1 - 0.55 = 0.45$).

Ap dung vao cong thuc Kelly, ta co bai toan:

$$f^* = \frac{1.0 \times 0.55 - 0.45}{1.0} = 0.10$$

Ket qua $f^* = 0.10$ tuong duong voi 10%. Dieu nay co nghia la neu tong so von trong tai khoan cua ban la 10.000.000 VND, cong thuc toan hoc khuyen ban nen dat chinh xac 1.000.000 VND vao cua Real Madrid thang o tran dau nay. Neu ket qua tinh toan ra mot con so am, dieu do co nghia la keo cuoc nay khong co gia tri loi nhuan (Value bet) va ban tuyet doi nen bo qua khong tham gia.

4. Bien the "Fractional Kelly" – Chien thuat an toan cho nguoi moi bat dau

Mac du cong thuc Kelly chuan mang lai toc do tang truong tai san cuc ky khung khiep, nhung no cung doi hoi nguoi choi phai co kha nang dinh luong xac suat ($p$) cuc ky chinh xac. Neu ban danh gia sai xac suat thuc te, cong thuc Kelly co the khien tai khoan cua ban bien dong rat manh.

De giam thieu rui ro nay, cac chuyen gia cua BONGDATA thuong khuyen nguoi choi ap dung chien thuat Half-Kelly (Nua Kelly) hoac Quarter-Kelly (Mot phan tu Kelly). Nghia la ban chi dat cuoc bang 1/2 hoac 1/4 so tien ma cong thuc Kelly chuan goi y. Day la cach tiep can thong minh, giup bao ve dong von mot cach an toan tuyet doi truoc nhung chuoi tran den dui, giup ban diem tinh dau tu dai han.

Thong tin chi tiet: Dia Chi: 50 Nguyen Van Troi, Phuong 8, Quan Phu Nhuan, TP. Ho Chi Minh Hotline: 0702 731 948 Email: bongdata@gmail.com #bongdata #bongdatadev #kqbd #lichthidau