@duy_200211: Không để 1 giây nào trôi qua lãng phí của em gái 😂 #xuhuongtiktok #hàihước #hptiktok

Buiducduy
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Tuesday 10 November 2026 06:36:21 GMT
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syeon100219
mỡ cutee🐷🌻🏳️‍🌈 :
trễ giờ làm á
2026-11-10 12:34:12
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anhchanghnguyn
Quân nè 72 :
Chúc mừng hai ae nha
2026-11-10 07:34:07
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tnt.2202
Nhựt Trường :
ông anh tui 😅
2026-11-10 12:43:36
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sn39005
￴ ￴ ￴ ￴ :
Trễ giờ nhậu
2026-11-10 12:45:08
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hoangphanpb
Hoàng Phan :
Đâu siêu tầm toàn tư liệu hiếm k z 😂
2026-11-10 06:46:18
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hi.ng81566
Thanh Lý :
Cơm của a grab nhờ cổ bưng dùm đó a ơi.
2026-11-10 14:21:12
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thihongcuc
Hongcuc :
trễ giờ bé gái đi học
2026-11-10 13:29:29
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quocduong__03
Quốc Dương :
2026-11-10 06:53:27
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trananhhoa2
Anh Hoà :
k lên xh nổi rồi kk
2026-11-10 07:28:30
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mthanhphong4705
mthanhphong :
🤣🤣🤣
2026-11-10 12:43:51
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minhtriduchoalongan
Minh Trí✈️ :
😂😂😂
2026-11-10 11:16:14
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nopham0105
Phạm Đức Chinh :
🤣🤣🤣
2026-11-10 07:28:06
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1996x1
SĨ 1 9 9 6 :
@ChamCham @bamtrinh
2026-11-10 13:09:24
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vantai8993
vantai1989@ :
😂😂😂
2026-11-10 09:56:18
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trankiett0910
Trần Kiệt :
😆😆😆
2026-11-10 12:49:05
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.thuyvi_1810
𝑽𝒊𝒗𝒊𝒂𝒏 🖤 :
😂😂
2026-11-10 11:24:44
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utduy71314
Út Duy 🚚🚛🚜 :
[Cười to tán thành][Cười to tán thành][Cười to tán thành]
2026-11-10 06:43:00
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➡️ Quantitative Finance from Scratch, part 45: Statistical Arbitrage.  The arbitrage from the last part was a profit without any risk. Statistical arbitrage is the practical version: many small bets that can each lose, but win on average. One of the best known and simplest forms is pairs trading: two stocks in the same business that move together. The gap between them, the spread = P_A − β · P_B (P_A price of stock A, P_B price of stock B, β the hedge ratio), keeps coming back to its average. That is the edge: the trade treats this return almost like a law, so the further the spread moves away, the more it should come back, and that way back is the profit. The rule: z = (spread − average) / standard deviation. When z reaches +2 or −2, you sell the expensive stock, buy the cheap one, and close both when the gap is back at its average. Because one stock is long and the other short, a move of the whole market mostly cancels out. News about one company can still hit a single pair, so funds make many such trades at once, and the surprises average out. The big risks: the link between two stocks can break for good, for example after a merger, and when many funds hold the same trades, they can all lose at once. The code (statarb_reel.py, 16 lines of plain Python without packages) is general on purpose: the spread from two prices and the hedge ratio, the z score, and the signal that sells the expensive stock and buys the cheap one at two standard deviations and closes at the average. If you want to go deeper, the link to my website is in my bio. #quantfinance #statisticalarbitrage #pairstrading #meanreversion #python Education only, not financial advice.
➡️ Quantitative Finance from Scratch, part 45: Statistical Arbitrage. The arbitrage from the last part was a profit without any risk. Statistical arbitrage is the practical version: many small bets that can each lose, but win on average. One of the best known and simplest forms is pairs trading: two stocks in the same business that move together. The gap between them, the spread = P_A − β · P_B (P_A price of stock A, P_B price of stock B, β the hedge ratio), keeps coming back to its average. That is the edge: the trade treats this return almost like a law, so the further the spread moves away, the more it should come back, and that way back is the profit. The rule: z = (spread − average) / standard deviation. When z reaches +2 or −2, you sell the expensive stock, buy the cheap one, and close both when the gap is back at its average. Because one stock is long and the other short, a move of the whole market mostly cancels out. News about one company can still hit a single pair, so funds make many such trades at once, and the surprises average out. The big risks: the link between two stocks can break for good, for example after a merger, and when many funds hold the same trades, they can all lose at once. The code (statarb_reel.py, 16 lines of plain Python without packages) is general on purpose: the spread from two prices and the hedge ratio, the z score, and the signal that sells the expensive stock and buys the cheap one at two standard deviations and closes at the average. If you want to go deeper, the link to my website is in my bio. #quantfinance #statisticalarbitrage #pairstrading #meanreversion #python Education only, not financial advice.

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