Understand speculation with futures

5.1.9 · Stock-Market › Futures

Speculators ko underlying asset nahi chahiye (gehu, sona, Nifty index). Unhe price movement se profit chahiye. Futures unhe dete hain:

1. Leverage – chhoti capital se badi positions control karo
2. Bidirectional play – rising (long) ya falling (short) markets dono se profit karo
3. Liquidity – standardized contracts exchange pe tight spreads ke saath trade hote hain
4. Delivery ki jhanjhat nahi – cash-settled hote hain ya expiry se pehle roll kar lo

Doosri taraf: margin calls aapki capital jaldi khatam kar sakti hai. Aapko minimum margin maintain karni padti hai; agar losses us mein ghus jaayein, broker aur cash maangta hai ya aapki position liquidate kar deta hai.

Speculation Hedging se KYUN Alag Hai

Hedger → asset ka maalik hai ya kharidne ka plan hai; futures ka use risk kam karne ke liye karta hai. Speculator → kuch bhi nahi rakhta; futures ka use potential profit ke liye risk lene ke liye karta hai.

Yeh kyun important hai: Speculators hedgers ko liquidity provide karte hain. Jab ek kisan wheat futures bechna chahta hai (hedge), ek speculator doosri taraf leta hai (bet karta hai ki wheat prices badhenge). Speculators ke bina, hedgers ko counterparties dhundhne mein takleef hoti, aur markets illiquid ho jaate.

Leverage KAISE Kaam Karta Hai: The Math

Contract value: $V=S\times \text{lot size}$ Margin required: $M=V\times \text{margin \%}$ Leverage: $L=\frac{V}{M}=\frac{1}{\text{margin \%}}$

Return on margin (speculator ka P&L):

jahaan $\Delta S=S_{\text{final}}-S_{\text{initial}}$.

First Principles se Derivation

1. Position size define karo: Aap asset ka $V=S\times \text{lot size}$ worth control karte ho.
2. Capital deployed: Exchange sirf $M=V\times m\%$ margin maangta hai (maan lo 10-20%).
3. Leverage factor: $L=V/M$. Agar margin 10% hai, $L=10$—aap har ₹1 ke liye ₹10 control karte ho.
4. Price change: Asset $S$ se $S+\Delta S$ ho jaata hai.
5. Absolute P&L: $\text{P\&L}=(\Delta S)\times \text{lot size}$ Lekin yeh poore contract value $V$ pe P&L hai. $V$ ke percentage ke roop mein: $\frac{\Delta S}{S}$.
6. Return on YOUR capital (margin $M$): $R_{\text{margin}}=\frac{\text{P\&L}}{M}=\frac{(\Delta S/S)\times V}{M}=\frac{\Delta S}{S}\times L$

Yeh step kyun? Aapne $M$ invest kiya, $V$ nahi. Asset mein 5% move, margin pe $5\%\times 10=50\%$ gain ya loss ban jaata hai.

Setup:

• Nifty spot 18,000
• Nifty futures (1-month): 18,050 (₹50 per point lot size)
• Lot size: 50 (toh 1 contract = 18,050 × 50 = ₹9,02,500)
• Margin: 12% = ₹1,08,300
• Aap 18,050 pe 1 contract kharidते ho

Scenario: Nifty expiry pe 18,500 tak badhta hai

1. Price change: $\Delta S=18,500-18,050=+450$ points
2. P&L: $450\times 50=₹22,500$ profit
3. Return on margin: $\frac{22,500}{1,08,300}\approx 20.8\%$

Yeh step kyun? Underlying $\frac{450}{18,050}\approx 2.5\%$ move hua, lekin aapka return $2.5\%\times 8.33\text{(leverage)}\approx 20.8\%$ hai.

Key insight: Ek modest 2.5% market move ne aapko 21% return diya. Yeh hai leverage ki power.

Setup:

• Gold futures: ₹55,000/10g (1 kg contract = 100 × 10g)
• Contract value: 55,000 × 100 = ₹55,00,000
• Margin: 8% = ₹4,40,000
• Aap ₹55,000/10g pe 1 contract short karte ho (bet ki price girega)

Scenario: Gold ₹53,000/10g tak girta hai

1. Price change: $\Delta S=53,000-55,000=-2,000$ per 10g
2. P&L: $(-2,000)\times 100=-2,00,000$ lekin aap SHORT ho, toh aap PROFIT karte ho $+2,00,000$
3. Return on margin: $\frac{2,00,000}{4,40,000}\approx 45.5\%$

Yeh step kyun? Shorting ka matlab hai jab price gire toh profit hota hai. Gold $\frac{2000}{55000}\approx 3.6\%$ gira; aapka return $3.6\%\times 12.5\approx 45\%$ hai.

Common mistake: Yeh bhool jaana ki price girne pe SHORT position se profit hota hai—students aksar P&L ko loss maan ke calculate karte hain.

Jab Cheezein Galat Ho Jaayein: Margin Calls

$M_{\text{initial}}$ = initial margin, $M_{\text{maintenance}}$ = minimum margin (typically initial ka 75%).

Mark-to-market (MTM) daily: $\text{Account balance}=M_{\text{initial}}+\sum (\text{daily P\&L})$

Margin call tab trigger hoti hai:

Aapko $M_{\text{initial}}$ restore karne ke liye cash deposit karni padti hai, warna broker aapki position liquidate kar deta hai.

Setup: Example 1 wali hi Nifty long (18,050 pe kharidi, margin ₹1,08,300).

Scenario: Agle din, Nifty 17,600 tak girta hai

1. Loss: $(17,600-18,050)\times 50=-22,500$
2. Account balance: $1,08,300-22,500=85,800$
3. Maintenance margin (1,08,300 ka 75%) = ₹81,225
4. Status: Abhi bhi maintenance ke upar hai, ABHI margin call nahi.

Day 2: Nifty 17,200 tak girta hai

1. Further loss: $(17,200-17,600)\times 50=-20,000$
2. Account balance: $85,800-20,000=65,800$
3. Maintenance margin se neeche! Broker margin call deta hai: ₹42,500 deposit karo initial margin restore karne ke liye, warna position auto-liquidate ho jaayegi.

Yeh step kyun? Daily MTM ka matlab hai losses turant realize ho jaate hain. Stocks ke unlike (jahaan aap dip mein hold kar sakte ho), futures aapko losses fund karne ya exit karne pe majboor karte hain.

Common Mistakes (Steel-Man)

Fix: Hamesha worst-case loss calculate karo. Agar aapka margin $M$ hai aur leverage $L$ hai, toh aapke against $1/L$ move = 100% loss. 10× leverage ke saath, 10% adverse move = margin khatam.

Fix: Margin buffer raho (minimum ka 2-3×). Stop-losses use karo taaki margin call territory se pehle loss cap ho jaaye.

Fix: $\text{Max contracts}=\frac{\text{Available capital}}{M_{\text{initial}}+\text{buffer}}$, jahaan buffer ≥ typical volatility ke 2-3 din × lot size.

Strategic Use: Long vs. Short Speculation

Short, long se practically zyada risky kyun hai:

• Long: Loss margin ke 100% pe cap hai (price zero se neeche nahi ja sakta... well, almost—oil April 2020 dekho).
• Short: Loss theoretically unlimited hai (price indefinitely badh sakti hai). Shorts pe margin calls jaldi aati hain.

Speculators aksar stop-loss orders use karte hain taaki agar price unke against $X$ move kare toh auto-exit ho jaaye, loss cap ho jaaye.

80/20: Sabse Zyada Kya Matter Karta Hai

Position sizing ki derivation (Kelly Criterion se simplified):

• Win rate $p$, loss rate $1-p$, avg win $W$, avg loss $L$.
• Capital ka optimal fraction: $f=\frac{pW-(1-p)L}{WL}$.
• Speculation ke liye (roughly $p\approx 0.5$, $W\approx L$ bina edge ke), $f\to 0$ → chhoti positions raho jab tak aapke paas edge na ho.

Yeh step kyun? Zyaatar speculators isliye lose karte hain kyunki woh over-leverage karte hain. Math kehti hai: bina proven edge ke, positions chhoti rakho.

Futures speculation bilkul waisi hai: thoda paisa neeche rakhte ho (margin) lekin ek BADI bet control karte ho (the contract). Agar price tumhare favor mein gayi, tum apne chhote paise ke comparison mein BAHUT zyada banate ho. Agar uske against gayi, tum apna paisa JALDI kho dete ho aur shayad aur bhi dena pad jaaye (margin call). Exchange us dost jaisa hai—woh tumhe badi bet karne ki power deta hai, lekin agar tum lose karne lage toh woh turant tumhara paisa wapas le leta hai, taaki sure kare ki tum pay kar sako.

Toh speculators woh log hain jo yeh game PASAND karte hain kyunki unhe lagta hai ki woh jaante hain price kis taraf jaayegi. Unhe actually 100 kg sona ya 1000 shares rakhne mein interest nahi—woh bas price pe bet lagaana chahte hain aur profit collect karna chahte hain (ya loss khana chahte hain).

Connections

• 5.1.01-What-are-futures-contracts – Foundation: futures structure
• 5.1.03-Hedging-with-futures – Opposite use case: risk reduction
• 5.1.05-Initial-and-maintenance-margin – Margin mechanics
• 5.1.07-Mark-to-market-settlement – Daily P&L realization
• 3.2.04-Short-selling – Short futures = equity short se aasaan/sasta
• 6.1.02-Options-vs-futures-leverage – Options downside cap karte hain; futures nahi
• 4.3.06-Position-sizing-Kelly-criterion – Kitna risk lena hai, uski math

Flashcards

#flashcards/stock-market

Futures ke saath speculation ka primary goal kya hai? :: Price movements se profit karna by directional risk lena, returns (aur losses) amplify karne ke liye leverage use karna.

Short speculation, long se zyada risky kyun hai? :: Long losses margin ke 100% pe cap hain (price ≥ 0); short losses theoretically unlimited hain (price indefinitely badh sakti hai). Shorts pe margin calls jaldi aati hain.

Concept Map