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Position Sizing (Defining Investment Size)

Determining the amount or number of shares to be invested in each asset, to control risk and return.

Such as

Investment portfolio 100,000 Baht

Share A = 30,000 Baht, Share B = 20,000 Baht, Share C = 50,000 Baht

Ratification of investments by risk

Position Sizing reduces risk beyond fit

Professional investors often scale their investments according to the risk and likelihood of each asset.

Position Sizing is the determination of investment size.

Divide the investment capital to suit the risk.

Help manage the port firmly and safely.

# Invest # Investment # Finance # Finance # Investment

2025/10/17 Edited to

... Read morePosition Sizing หรือการกำหนดขนาดการลงทุน เป็นเครื่องมือสำคัญที่ช่วยให้นักลงทุนสามารถบริหารความเสี่ยงได้อย่างมีประสิทธิภาพมากขึ้น โดยหลักการนี้จะช่วยให้นักลงทุนไม่ต้องแบกรับความเสี่ยงมากเกินไปในสินทรัพย์ที่มีความผันผวนสูง และในขณะเดียวกันก็ไม่พลาดโอกาสในการรับผลตอบแทนจากสินทรัพย์ที่มีความเสี่ยงต่ำกว่า จากตัวอย่างในภาพ POSITION SIZING ผลตอบแทนปรับความเสี่ยง นักลงทุน A ลงทุนในหุ้นที่มีความผันผวนสูงได้ผลตอบแทน 10% ในขณะที่นักลงทุน B ลงทุนหุ้นที่ความผันผวนต่ำได้ผลตอบแทน 8% แต่เมื่อนำผลตอบแทนมารวมกับความเสี่ยง (Risk-Adjusted Return หรือ RA RETURN) พบว่า นักลงทุน B อาจมีประสิทธิภาพของการลงทุนที่ดีกว่า เพราะรับความเสี่ยงต่ำกว่าแต่ได้ผลตอบแทนใกล้เคียงกัน ดังนั้น การจัดสัดส่วนเงินลงทุนหรือขนาดการลงทุนในแต่ละสินทรัพย์ไม่ควรขึ้นอยู่กับผลตอบแทนเพียงอย่างเดียว แต่ต้องพิจารณาควบคู่กับระดับความเสี่ยงที่เหมาะสมกับเป้าหมายและความสามารถในการรับความเสี่ยงของแต่ละบุคคลด้วย โดยนักลงทุนมืออาชีพมักมีการปรับพอร์ตลงทุน (Position Sizing) ด้วยเกณฑ์อย่างชัดเจน เช่น การตั้งขนาดการลงทุนในหุ้นที่ผันผวนสูงให้น้อยลง เพื่อจำกัดความเสี่ยง แต่เพิ่มสัดส่วนในสินทรัพย์ที่มีความเสี่ยงต่ำและผลตอบแทนสม่ำเสมอขึ้น นอกจากนี้ เทคนิค Position Sizing ยังทำให้นักลงทุนสามารถควบคุมความเสี่ยงโดยรวมของพอร์ตลงทุน ป้องกันการขาดทุนหนักเมื่อสินทรัพย์ใดสินทรัพย์หนึ่งเกิดความผันผวนมากเกินไป และยังช่วยให้พอร์ตลงทุนมีความสมดุลและรักษาเสถียรภาพในระยะยาวอีกด้วย สรุปคือ Position Sizing เป็นวิธีจัดสรรเงินลงทุนที่คำนึงถึงระดับความเสี่ยงของแต่ละสินทรัพย์อย่างจริงจัง ช่วยให้นักลงทุนวางแผนบริหารพอร์ตอย่างมั่นใจและมีประสิทธิภาพมากขึ้น เหมาะทั้งสำหรับนักลงทุนมือใหม่และมืออาชีพที่ต้องการสร้างผลตอบแทนที่ดีจากการลงทุนพร้อมกับควบคุมความเสี่ยงอย่างเหมาะสม

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