In this post we’ll take a look at the backtest results of opening one SPY short call 0 DTE cash-secured position each trading day from Feb 1 2018 through Jul 15 2020 and see if there are any discernible trends. We’ll also explore the profitable strategies to see if any outperform buy-and-hold SPY.
There are 10 backtests in this study evaluating over 5,900 SPY short call 0 DTE cash-secured trades.
Let’s dive in!
Systematically opening SPY short call 0 DTE cash-secured positions was profitable no matter which strategy was selected.
None of the option strategies outperformed SPY with regard to total return.
- Symbol: SPY
- Strategy: Short Call
- Days Till Expiration: 0 DTE +/- 3, closest to 0
- Start Date: 2018-02-01
- End Date: 2020-07-15
- Positions opened per trade: 1
- Entry Days: daily
- Entry Signal: N/A
- Timing: 3:46pm ET
- Strike Selection
- 5 delta +/- 4.5 delta, closest to 5
- 10 delta +/- 5 delta, closest to 10
- 16 delta +/- 6 delta, closest to 16
- 30 delta +/- 8 delta, closest to 30
- 50 delta +/- 8 delta, closest to 50
- Trade Entry
- 5D short put
- 10D short put
- 16D short put
- 30D short put
- 50D short put
- Trade Exit
- 50% max profit or expiration, whichever occurs first
- Hold till expiration
- Max Margin Utilization Target (short option strats only): 20% | 1x leverage
- Max Drawdown Target: 99% | account value shall not go negative
- Margin requirements are always satisfied
- Margin calls never occur
- Margin requirement for short CALL and PUT positions is 20% of notional
- Margin requirement for short STRADDLE and STRANGLE positions is 20% of the larger strike
- Margin requirement for short VERTICAL SPREAD positions is the difference between the strikes
- Early assignment never occurs
- Prices are in USD
- Prices are nominal (not adjusted for inflation)
- Margin collateral is invested in 3mo US treasuries and earns interest daily
- Assignment P/L is calculated by closing the ITM position at 3:46pm ET the day of expiration / position exit
- Commission to open, close early, or expire ITM is 1.00 USD per contract
- Commission to expire worthless is 0.00 USD per contract
- Commission to open or close non-option positions, if applicable, is 0.00 USD
- Slippage is calculated according to the slippage table
- Starting capital for short option backtests is adjusted in $100 increments such that max margin utilization is between 80-100%, closest to 100%, of max margin utilization target
- Starting capital for long option backtests is adjusted in $100 increments such that max drawdown is between 80-100%, closest to 100%, of max drawdown target
- For comprehensive details, visit the methodology page
Early management allows a smaller starting portfolio value since the maxim number of concurrent positions is capped. Less capital is “turned over” faster vs holding till expiration.
The effects of early management are muted due to the “ultra short” duration of 0-3 DTE options.
Early management yielded a lower average margin utilization vs holding till expiration.
Hindsight bias was used to maximize Reg-T margin utilization for each strategy. This allows a “best case” scenario for the option strategy to outperform the benchmark.
Also displayed is the date in which each strategy experienced maximum margin utilization.
Early management had mixed rates of premium capture vs holding till expiration.
The higher the delta, the lower the premium capture. 30D was an exception.
Managing trades early outperformed holding till expiration with regard to win rate.
The higher the delta, the lower the win rate.
Max Drawdown Duration
Average Trade Duration
Managing trades at 50% max profit or expiration yielded no material change in average trade duration.
Compound Annual Growth Rate
Profit Spent on Commission
25.90% – the average percent of profits spent on commission across profitable option strategies.
Early management outperformed holding till expiration with regard to total P/L. 5D was an exception.
Total profit and loss performance was mixed across delta targets.
All option strategies were profitable.
My hypothesis walking into this study was that performance would be similar to the 45-DTE version – unprofitable in virtually all scenarios.
It turns out my hypothesis was wrong. All strategies were profitable across all scenarios.
This is likely due to the distribution of IV overstatement across deltas being more uniform at 0-DTE vs 45-DTE.
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