Understand margin calls and square-off

4.3.7 · Stock-Market › How to Trade — Execution & Platforms

1. First principles: margin kya hota hai?

Aao har cheez ko scratch se define karte hain taaki kuch bhi blindly memorise na ho.

Position value $V$ = jo tumhare paas hai uski current market value.
Borrowed amount $B$ = broker ne tumhe jo paisa lend kiya (entry pe fixed rehta hai jab tak pay/close na karo).
Equity $E$ = tumhari actual ownership stake: $E = V - B$

2. Maintenance-margin condition derive karna

Broker ek maintenance margin set karta hai — ek minimum fraction $m$ position value ka, jo tumhari equity ko hamesha cover karna chahiye.

Yeh step kyun? Broker ko tumhari entry price ki parwah nahi — sirf abhi ki. Agar tumhari equity current value ke ek hisse se neeche chali jaaye, to loan under-collateralised ho jaata hai.

Woh price solve karo jo call trigger karti hai

Maano tumhare paas $Q$ shares hain, borrowed $B$ , current price $P$ . To $V = QP$ aur $E = QP - B$ .

Trigger equality set karo $E = mV$ : $QP - B = m QP$ $QP (1 - m) = B$ $P_{call} = \frac{B}{Q ( 1 - m )}$

Yeh step kyun? Humne $P$ isolate kiya taaki exact woh price pata chale jis par cushion apne legal minimum par aa jaata hai. $P_{call}$ se neeche tumhe call aayega.

3. Square-off

Do common triggers:

Margin shortfall: equity girती rehti hai aur tum funds add nahi karte → broker liquidate kar deta hai.
Time-based (intraday): MIS/intraday products market close se pehle auto square-off ho jaate hain (jaise ~3:20 PM) kyunki leverage sirf din ke liye tha.

Figure — Understand margin calls and square-off

5. Common mistakes (steel-manned)

7. Active recall — flashcards

Leveraged position mein equity kya hoti hai?

Tumhari true stake,

E = V - B

(current value minus borrowed amount).

Margin call kab trigger hota hai?

Jab equity maintenance requirement se neeche chali jaaye:

E < mV

Margin-call price ka formula?

P_{call} = \frac{B}{Q ( 1 - m )}

Square-off kya hota hai?

Broker ka forcibly tumhari open position close karna taaki unka loaned capital protect ho sake ya intraday time cut-off par.

Square-off ke do triggers?

(1) Unmet margin shortfall; (2) time-based intraday auto square-off close se pehle.

Kya margin call ek penalty hai?

Nahi — yeh tumhara apna margin cushion restore karne ki request hai; time par meet karne par koi fine nahi.

Kya square-off tumhari entry price par execute hota hai?

Nahi — current market price par, aksar loss mein.

Margin call cure kaise karte hain?

Funds add karo (

E

badhao) ya position reduce karo (

B

V

ghataao) jab tak

E \geq mV

na ho jaaye.

Zyada leverage se calls pehle kyun aate hain?

Bada

B

P_{call}

ko badhata hai, isliye ek chhota price drop trigger cross kar leta hai.

Recall Feynman: ek 12-saal ke bachche ko samjhao

Socho ek dost tumhe paisa deta hai badi candy ki theli kharidne ke liye, lekin sirf tab jab tum apne kuch sikke bhi safety pile ke roop mein daalo. Agar candy ki price girr jaaye, tumhari safety pile chhoti ho jaati hai. Tumhara dost kehta hai "aur sikke daalo!" — yahi margin call hai. Agar nahi daale, to dost candy le leta hai aur bech deta hai taaki tumhari pile khatam hone se pehle apna paisa wapas le le — yahi square-off hai. Woh bas ensure kar rahe hain ki unka paisa kabhi na jaaye — tumhara loss tumhara rehta hai.

Connections

Leverage and Margin Trading
Intraday vs Delivery (MIS vs CNC)
Stop-Loss Orders
Position Sizing and Risk Management
Order Types and Execution
Overnight Gap Risk

1. First principles: margin kya hota hai?

2. Maintenance-margin condition derive karna

Woh price solve karo jo call trigger karti hai

3. Square-off

4. Worked examples

5. Common mistakes (steel-manned)

6. Forecast-then-Verify

7. Active recall — flashcards

Connections

Concept Map