Nifty 50 Index
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Weekly vs Monthly Options Trading

28
1. Understanding Weekly and Monthly Options
Monthly Options

Also known as standard expiry options.

These options expire on the last Thursday of every month in markets like India (NSE).

They have been around since the inception of exchange-traded options.

Provide a longer duration of time value and stable premium structure.

Weekly Options

Introduced to provide short-term trading opportunities.

These options expire every Thursday (except monthly expiry week).

Much shorter lifespan—often just 5–7 days.

Popular in instruments like Nifty, Bank Nifty, FinNifty, and stocks (limited list).

2. Time Value & Theta Decay

One of the most important differences between weekly and monthly options is theta decay—the rate at which option premium loses value as expiry approaches.

Monthly Options

Have slower theta decay in the early weeks.

Premium erodes gradually.

Most decay accelerates in the last 7–10 days before expiry.

Suitable for swing and positional option selling.

Weekly Options

Have very fast theta decay.

Premium can melt drastically 2–3 days before expiry or even intraday.

Perfect for intraday and short swing theta-based strategies.

But risky for buyers since rapid decay eats premium quickly.

In short:

Sellers benefit more from weeklies due to rapid premium erosion.

Buyers must time entries well or risk losing premium quickly.

3. Liquidity & Bid–Ask Spreads
Monthly Options

Generally deep liquidity, especially in indices like Nifty.

Bid–ask spreads are narrower.

Easy to place big orders.

Weekly Options

Liquidity varies by strike.

ATM and near strikes have excellent liquidity in Nifty & Bank Nifty.

But far OTM strikes or stock weeklies may have wider spreads.

Bottom line:
Weekly options = high liquidity in popular indices.
Monthly options = stable liquidity across many strikes.

4. Volatility Impact (Vega)
Monthly Options

Higher vega.

More sensitive to changes in implied volatility (IV).

Good for volatility-based strategies like straddles, strangles, long vega positions, calendar spreads.

Weekly Options

Lower vega.

Less sensitive to IV unless close to events like results or macro announcements.

Therefore:
If you want to trade volatility → choose monthly options.
If you want to trade quick moves/time decay → choose weekly options.

5. Cost & Premium Differences
Monthly Options

Higher premiums because more time value exists.

Suitable for:

Hedging

Swing options buying

Calendar spreads

Position building

Weekly Options

Much cheaper premiums due to short life.

Allows:

Quick scalping

Event-specific trading

Intraday buying and selling

But sharp moves can wipe out premiums fast.

For buyers:

Monthly = safer, but slower.

Weekly = cheaper, but high risk.

6. Risk Differences
Risk in Weekly Options

Very high for buyers due to theta decay.

High for sellers during volatile sessions.

Strikes can become worthless within minutes near expiry.

Very sensitive to intraday big moves (gamma risk).

Risk in Monthly Options

More stable, controlled decay.

Better for hedged strategies.

Lower intraday gamma exposure.

Gamma exposure:

Weekly > Monthly

Means weekly options react faster to price moves: good for directional traders, dangerous for late sellers.

7. Which Is Better for Option Buyers?
Monthly Options

Better for buyers because:

More time for the trade to work.

Slower premium decay.

Good for swing/positional directional trades.

Weekly Options

Useful only when:

You expect a sharp, fast move (e.g., news, breakout, expiry day momentum).

Intraday or same-day scalping.

General rule:

Buyers prefer monthly options.

Experienced intraday traders may buy weeklies for quick momentum.

8. Which Is Better for Option Sellers?
Weekly Options

Best tool for sellers.

Rapid theta decay = high edge.

Ideal for:

Short straddles/strangles

Credit spreads

Iron condors

Intraday selling

Expiry day option selling

Monthly Options

Used for safe, hedged, non-aggressive selling.

Good for:

Covered calls

Calendar spreads

Iron condors

Protected strangles

General rule:

Sellers prefer weekly for profit.

Monthly for stability and lower risk.

9. Event Trading: Weekly vs Monthly
Weekly Options

Used for:

RBI policy

Fed minutes

Budget week

Elections

Major results (if available on the stock)

Global announcements

Because weeklies allow cheap premia and controlled exposure for short periods.

Monthly Options

Used for:

Longer-term swing trading around events.

Volatility build-up strategies.

Protecting long-term portfolios.

10. Strategies Suitable for Each
✔ Weekly Options: Best Strategies

Intraday scalping (ATM options)

Expiry day straddle/strangle selling

Credit spreads for quick decay

Ratio spreads

Iron flies (expiry week)

Short gamma strategies

✔ Monthly Options: Best Strategies

Long calls/puts (positional)

Calendar spreads (monthly vs weekly)

Diagonal spreads

Covered calls

Vertical debit spreads

Condors for stable markets

11. Who Should Trade What?
Weekly Options – Ideal for

Experienced intraday traders

Scalpers

Option sellers

Short-term event traders

High-risk traders

Monthly Options – Ideal for

Beginners

Positional traders

Swing traders

Hedgers

Risk-averse participants

12. Pros & Cons Summary
Weekly Options

Pros

Fast returns

Low premium

Ideal for intraday/expiry

High theta decay

Great for sellers

Cons

Very risky for buyers

Sudden losses during volatility

Requires precision timing

Higher gamma risk

Monthly Options

Pros

More stable

Less risky

Longer time value

Suitable for swing buyers

Good for hedging

Cons

Slower returns

Higher capital for sellers

Less excitement compared to weeklies

Final Conclusion

Weekly and monthly options serve different purposes. Weekly options provide speed, volatility, and rapid theta decay, making them ideal for advanced traders, especially sellers and intraday scalpers. Monthly options provide stability, safer premiums, and slower decay, making them suitable for swing traders, beginners, and long-term strategists.

A trader can use both depending on goals:

Weekly for tactical short-term trades.

Monthly for strategic long-term positioning.

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