Ratio Call Spread

Options Spreads Advanced Singapore STI DBS OCBC UOB SINGTEL KEPPEL CAPLAND

Moderately Bullish with Target Price

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Quick Reference

Strategy Type Complex Spread (Often Credit or Small Debit)
Market Outlook Moderately Bullish with Target Price
Risk Profile Limited downside, UNLIMITED upside risk above short strikes
Reward Profile Maximum profit at short strike price
Time Horizon 30-45 DTE recommended
Iv Environment High IV preferred (selling more options than buying)
Breakeven Lower: Long strike + net debit (if any) | Upper: Short strike + max profit / extra contracts

Payoff Profile

The ratio call spread creates an asymmetric payoff with maximum profit at the short strike. Limited downside risk but UNLIMITED upside risk if price rises too far. • At the short strike price at expiration • Limited to net debit paid (or profit if done for credit) • UNLIMITED above upper breakeven • Two breakevens if done for debit; one upper breakeven always

Singapore Market Details

Primary Instruments STI Index Options, DBS Options, OCBC Options, UOB Options
Mas Compliance MAS regulated; retail trading permitted with licensed broker; MARGIN REQUIRED for naked portion
Contract Size S$5 per point for STI; 1,000 shares for equities; 100 shares for ETFs
Trading Hours 9:00 AM - 5:00 PM SGT (Pre-Open 8:30 AM - 9:00 AM)
Expiry Options Monthly expiries; limited weekly options
Settlement T+2 for shares; T+1 for SGX derivatives
Tax Treatment No capital gains tax for individuals in Singapore
Stamp Duty 0.2% on share purchases (buyer and seller each); options exempt
Cdp Account Central Depository (CDP) account required for share ownership; not needed for options

Frequently Asked Questions

Why would anyone accept unlimited upside risk?

Traders accept this risk because: (1) they have a specific price target and don't believe the underlying will exceed it, (2) the entry can be done for zero cost or credit, (3) they plan to actively manage and close before losses accumulate. The key is having a strong thesis about the price ceiling and disciplined risk management.

What's the difference between a ratio spread and selling naked calls?

In a ratio spread, you have a long call that covers the first short call - only the extra short call(s) are naked. A 1:2 ratio has 1 covered short call and 1 naked short call. This means you profit from a moderate rise (unlike naked calls which lose immediately on any rise) and only face unlimited risk above the upper breakeven.

Can I lose money if the stock goes down?

It depends on your entry cost. If done for a credit, you keep that credit if the stock falls (profit). If done for a debit, you lose that debit if the stock falls below your long strike. The downside risk is limited and known at entry - it's the upside that has unlimited risk.

What margin is required for a ratio spread?

Margin is required for the naked portion. In a 1:2 ratio, one short call is covered by the long call, but the second short call is naked and requires margin similar to selling a naked call. Check with your broker - margin requirements vary.

Should beginners trade ratio spreads?

No. Ratio spreads require advanced understanding of Greeks, active position management, comfort with unlimited risk, and discipline to exit before large losses. Beginners should master regular vertical spreads first. Only trade ratio spreads when you fully understand the unlimited upside risk.

How do I choose between 1:2 and 1:3 ratios?

1:2 ratio: One naked call, moderate upside risk, smaller credit/larger debit. 1:3 ratio: Two naked calls, higher upside risk, larger credit/smaller debit. Use 1:3 only when extremely confident price won't exceed target, as two naked calls double your exposure to upside moves. Most traders stick with 1:2.

When should I roll vs close a ratio spread?

Close when: Price approaches upper breakeven, thesis is wrong, or you've captured 50-75% of max profit. Roll when: You want to give the trade more time because thesis is still valid, and you can roll for a credit or small debit. Never roll just to avoid realizing a loss if your thesis has changed.

How does IV crush affect my ratio spread after events?

IV crush helps your net short vega position. After events, if IV drops, your short calls lose value faster than your long call, benefiting you. This is why some traders enter ratio spreads before events - to profit from both moderate price move and IV crush. But beware of large price gaps.

Can I convert my ratio spread to eliminate upside risk mid-trade?

Yes. Buy a call at a strike above your short strikes to create a butterfly. This caps your upside risk at the cost of the additional call. You sacrifice some profit potential but gain peace of mind. Do this if circumstances change and you're concerned about upside.

What if the stock gaps up overnight through my upper breakeven?

This is the nightmare scenario. You'll face immediate significant losses with no opportunity to manage. At market open, assess the situation. If the gap seems sustainable, close immediately to prevent further losses. This is why position sizing and avoiding high-risk periods (earnings, events) is crucial.

How do I dynamically hedge a ratio spread using delta?

Monitor your net delta continuously. As price rises above the short strike and delta becomes significantly negative, buy delta via underlying (CFDs, futures, ETF) to offset. For example, at -0.40 delta, buy 0.40 delta worth of underlying. This locks in losses on the options but prevents further downside. It's essentially converting to a delta-neutral position.

What's the optimal volatility environment for ratio spread entries?

Look for: IV rank > 50% (expensive short calls), flat or positive call skew (OTM calls not too cheap), and expected IV contraction (post-event entries or mean reversion expectations). The ideal entry is when short call IV is elevated relative to ATM IV (your long call), maximizing the credit received or minimizing debit.

How should I integrate ratio spreads into a portfolio?

Limit ratio spreads to 3-5% of portfolio given unlimited risk. Use them as income enhancement on stocks you have a thesis about. Track aggregate portfolio Greeks - ratio spreads add negative vega and potentially negative delta above short strikes. Consider them as targeted tactical positions, not core holdings.

When does a skip-strike ratio spread make sense?

Skip-strike ratios (e.g., buy 3200, skip 3250, sell 2×3300) make sense when: (1) You want a wider profit zone, (2) The intermediate strike has poor liquidity, (3) You're willing to accept less max profit for more safety margin above the short strike. The tradeoff is typically larger net debit or smaller credit.

What's the mathematical edge in ratio spread trading?

Edge comes from: (1) IV overpricing the short calls relative to expected move, (2) Strong resistance at short strike limiting upside, (3) Mean reversion of IV benefiting net short vega. Backtest your thesis - if the underlying historically respects your resistance level and IV tends to overstate moves, you have potential edge. But remember, edge doesn't eliminate risk of the one time it doesn't work.

Related Strategies

Bull Call Spread
Call Backspread (1:2 reversed)
Call Butterfly

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