Synthetic Short Stock

Income Strategies Advanced Canada XIU RY TD ENB CNR SU BCE BMO BNS CP

Bearish - expecting stock to decline

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Quick Reference

Strategy Type Short Stock Replacement (Long Put + Short Call at Same Strike)
Market Outlook Bearish - expecting stock to decline
Risk Profile Unlimited upside risk (like shorting stock)
Reward Profile Limited profit (stock can only go to $0)
Time Horizon 30-90 days typical; can roll indefinitely
Iv Environment Any IV; higher IV may create small credit entry
Breakeven Strike price (approximately equal to current stock price)

Canada Market Details

Primary Instruments TSX 60 components with liquid options at ATM strikes, XIU ETF
Iiroc Compliance Level 4 options approval required; margin account mandatory
Contract Size 100 shares for equity options; XIU options represent 100 ETF units
Trading Hours 9:30 AM - 4:00 PM ET
Expiry Options Monthly expiries standard; LEAPS available for longer-term synthetic
Settlement T+1 for equities (effective May 2024); options settle next business day after expiry
Options Exchange Montreal Exchange (MX) for all Canadian options
Capital Gains Tax 50% inclusion rate; synthetic profits taxed as capital gains
Tfsa Eligibility NOT PERMITTED - short call requires margin
Rrsp Eligibility NOT PERMITTED - naked call not allowed
Margin Note Significant margin required for naked call; typically 20-30% of notional + premium

Frequently Asked Questions

What's the biggest risk of synthetic short stock?

UNLIMITED upside risk. If the stock rallies, your losses have no cap. A stock can go from $80 to $200+ in certain scenarios (takeovers, short squeezes), resulting in losses of $12,000+ per synthetic. Stop losses are absolutely essential.

Why would I use synthetic short instead of just buying a put?

Buying a put has limited risk (premium only) but lower delta (~0.50). Synthetic short has higher delta (-1.00, full short exposure) and often costs zero to enter. If you want full short participation and accept unlimited risk, synthetic is more capital efficient.

What happens at expiration if the stock is below the strike?

If stock is below strike: your put is ITM (valuable), your short call is OTM (expires worthless). You can sell the put for profit or exercise it to go short stock at the strike. Usually selling is better.

What happens at expiration if the stock is above the strike?

If stock is above strike: your put is OTM (expires worthless), your short call is ITM (will be assigned). You'll be forced to sell 100 shares at the strike price - if you don't own them, you'll be short stock. This is your loss.

How does synthetic short make money?

Profit when the stock price falls. For every $1 the stock drops, you make $100 (just like being short 100 shares). Maximum profit occurs if the stock goes to $0, at which point you'd make Strike × 100 dollars.

How do I roll a synthetic short position?

Close the current month (sell put, buy back short call), then open the new month (buy new put, sell new call). Usually costs a small debit to roll because you're buying more time value. Roll at 14-21 DTE.

What if my short call is assigned early?

If assigned, you're short 100 shares at the strike. You still have your long put as downside hedge. You can: cover the stock and reconstruct synthetic, keep the short stock with put protection, or close everything. Early assignment is most likely before ex-dividend.

How does margin requirement compare to shorting stock?

Synthetic typically requires ~20-30% margin for the naked call. Actual short stock requires 50% initial margin plus cushion. Plus, synthetic has no borrow fees which can be 5-50%+ for hard-to-borrow stocks.

Should I avoid high-dividend stocks for synthetic shorts?

Generally yes. High dividends increase early assignment risk before ex-date. If assigned, you'll owe the dividend. Either avoid these stocks, or be prepared to roll ITM calls before ex-dates.

What is short interest and why does it matter?

Short interest is the percentage of shares outstanding that are sold short. High short interest (>20%) means crowded short - many people betting against the stock. This increases short squeeze risk. Avoid shorting crowded shorts.

How can I cap my upside risk on a synthetic short?

Buy a call above your synthetic short strike. Example: Synthetic at $80 + Long $90 call. This caps your maximum loss at $10 per share. You've converted unlimited risk to defined risk. Cost is the call premium.

What is pair trading with synthetics?

Go synthetic long on one stock, synthetic short on another (usually in same sector). You're betting on relative performance, not market direction. Example: Long TD synthetic, Short BMO synthetic = bet that TD outperforms BMO.

How do I use synthetic shorts for portfolio hedging?

Add synthetic shorts to reduce portfolio delta. If portfolio is too long, synthetic shorts reduce exposure without selling longs (avoiding tax events). Calculate beta-adjusted size for proper hedge. Can also short index ETF (XIU) synthetically.

What's the dividend arbitrage risk with synthetic shorts?

Before ex-dividend, ITM calls may be exercised early by holders wanting the dividend. If assigned, you're short stock and OWE the dividend on record date. Large dividends increase this risk. Roll or close ITM calls before ex-date.

How do I identify stocks to avoid shorting synthetically?

Avoid: High short interest (>20%), low float, meme stock attention, M&A rumors, heavily discussed on social media, recent squeeze history. Check short interest weekly. These stocks can squeeze 50-500%+ causing catastrophic losses.

Related Strategies

Short Stock
Long Put
Bear Put Spread
Long Call (Cap)
Synthetic Long (Hedge)

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