Maximum Drawdown — Worst Case Scenario ka Measure

Maximum Drawdown (MDD) ek investment ya strategy ki peak value se trough value tak ki percentage decline hai. Formula: MDD = (Trough Value minus Peak Value) divided by Peak Value, multiplied by 100.

Example: Aapka portfolio January mein 10 lakh tha. June mein 6 lakh ho gaya. July mein 12 lakh. MDD calculation: Peak = 10 lakh. Trough = 6 lakh. MDD = (6 minus 10) divided by 10 = minus 40 percent. Yeh 40 percent maximum drawdown hua.

MDD sirf final loss nahi hai. Yeh peak to trough ki worst journey hai jo aapne experience ki. Agar aapka portfolio kabhi bhi ek point se 40 percent neeche aaya ho, chahe baad mein recover ho gaya ho, MDD 40 percent hai.

Investors generally think karte hain ki agar unka portfolio 20 percent neeche gaya aur phir 20 percent upar aaya toh woh breakeven par aaye. Yeh wrong hai. 100 pe minus 20 percent = 80. 80 pe plus 20 percent = 96. Hum 4 percent down hain.

Isee asymmetry of gains and losses kehte hain. 20 percent loss ko recover karne ke liye 25 percent gain chahiye. 30 percent loss ke liye 43 percent gain chahiye. 50 percent loss ke liye 100 percent gain chahiye. 70 percent loss ke liye 233 percent gain chahiye.

Yahi reason hai ki MDD manage karna critically important hai. Chhota drawdown recovery mein thoda time lagta hai. Bada drawdown recover karna mathematically increasingly difficult ho jaata hai.

Calmar Ratio ek performance metric hai jo annualized return ko maximum drawdown se divide karta hai. Calmar = Annualized Return divided by Absolute Maximum Drawdown. Yeh ratio batata hai ki kitna return mil raha hai har unit of peak-to-trough risk ke liye.

Strategy A: 20 percent annual return, 10 percent MDD. Calmar = 2.0. Strategy B: 30 percent annual return, 40 percent MDD. Calmar = 0.75. Strategy A ka Calmar zyada hai matlab zyada efficient hai risk ke hisaab se.

Practically MDD define karo apne portfolio ke liye. Kitna drawdown aap emotionally handle kar sakte ho? Agar 30 percent drawdown hoga toh kya aap panic sell karoge? Agar haan, toh portfolio design karo jo maximum 15 to 20 percent drawdown generate kare even in worst case.