Learning more about options trading myself now so figuring out the ropes - how come you’re buying $250 calls for Jun 26 when it’s currently at $252? How do you think about expiry date and strike price when trading options?
Despite its apparent edge, the strategy is not arbitraged away, and an edge persists due to several market dynamics and structural factors.
Why This Strategy Is Not Arbitraged Away
Arbitrage implies risk-free profit by exploiting mispriced assets, but this strategy involves risk, friction, and inefficiencies that prevent perfect arbitrage
Market Frictions and Costs: Transaction Costs: Bid-ask spreads on SPX options (avg $0.10-$0.30 per contract) and commissions ($0.50-$1/contract for retail) eat into profits.
Behavioral and Psychological Barriers: Herd Behavior: Many traders avoid selling puts after sell-offs due to fear of further declines (e.g., Jun 11’s -1.1% 3-day drop). This under-participation preserves the edge for disciplined players.
Backtesting and executing this strategy requires sophisticated analysis and discipline. Most retail traders lack the tools or patience, reducing competition.