Option Strategies

Short Jelly Roll

Introduction

A Short Jelly Roll, or simply Short Roll, is a combination of a short call calendar spread and a long put calendar spread. It is the inverse of a jelly roll. It consist of selling a put and buying a call of the same expiry, as well as buying a put and selling a call with a further expiry, where all of the contracts have the same strike prices. This strategy serves as an arbitrage on Option mispricing due to the temporary disparity between the call spread and the put spread synthetic portfolios. It is a delta-, gamma-, vega-, and theta-neutral strategy, but sensitive to rho (interest rate) and phi (dividend yield).

Implementation

Follow these steps to implement the short jelly roll strategy:

  1. In the Initializeinitialize method, set the start date, set the end date, and create an Option universe.
  2. private Symbol _symbol;
    
    public override void Initialize()
    {
        SetStartDate(2017, 4, 1);
        SetEndDate(2017, 4, 22);
        SetCash(100000);
    
        UniverseSettings.Asynchronous = true;
        var option = AddOption("GOOG", Resolution.Minute);
        _symbol = option.Symbol;
        option.SetFilter(x => x.IncludeWeeklys().JellyRoll(5m, 30, 60));
    }
    def initialize(self) -> None:
        self.set_start_date(2017, 4, 1)
        self.set_end_date(2017, 4, 22)
        self.set_cash(100000)
    
        self.universe_settings.asynchronous = True
        option = self.add_option("GOOG", Resolution.MINUTE)
        self._symbol = option.symbol
        option.set_filter(lambda x: x.include_weeklys().jelly_roll(5.0, 30, 60))
  3. In the OnDataon_data method, select the expiry and strikes of the contracts in the strategy legs.
  4. public override void OnData(Slice slice)
    {
        if (Portfolio.Invested) return;
    
        // Get the OptionChain
        if (!slice.OptionChains.TryGetValue(_symbol, out var chain))
        {
            return;
        }
    
        // Select expiry dates and strike price
        var strike = chain.OrderBy(x => Math.Abs(chain.Underlying.Price - x.Strike)).First().Strike;
        var contracts = chain.Where(x => x.Strike == strike).ToList();
        var farExpiry = contracts.Max(x => x.Expiry);
        var farExpiry = contracts.Max(x => x.Expiry);
        var nearerExpiries = contracts.Where(x => x.Expiry < farExpiry);
        if (!nearerExpiries.Any()) return;
        var nearExpiry = nearerExpiries.Min(x => x.Expiry);
    def on_data(self, slice: Slice) -> None:
        if self.portfolio.invested:
            return
    
        # Get the OptionChain
        chain = slice.option_chains.get(self._symbol, None)
        if not chain:
            return
    
        # Select an expiry date and ITM & OTM strike prices
        strike = sorted([x.strike for x in chain], key=lambda x: abs(x - chain.underlying.price))[0]
        contracts = [x for x in chain if x.strike == strike]
        far_expiry = max([x.expiry for x in contracts])
        nearer_expiries = [x.expiry for x in contracts if x.expiry < far_expiry]
        if not nearer_expiries:
            return
        near_expiry = min(nearer_expiries)
  5. In the OnDataon_data method, select the contracts and place the order.
  6. Approach A: Call the OptionStrategies.ShortJellyRollOptionStrategies.jelly_roshort_jelly_rollll method with the details of each leg and then pass the result to the Buybuy method.

    var shortJellyRoll = OptionStrategies.ShortJellyRoll(_symbol, strike, nearExpiry, farExpiry);
    Buy(shortJellyRoll, 1);
    short_jelly_roll = OptionStrategies.short_jelly_roll(self._symbol, strike, near_expiry, far_expiry)
    self.buy(short_jelly_roll, 1)

    Approach B: Create a list of Leg objects and then call the Combo Market Ordercombo_market_order, Combo Limit Ordercombo_limit_order, or Combo Leg Limit Ordercombo_leg_limit_order method.

    // Select the call and put contracts
    var nearCall = contracts.Single(x => x.Expiry == nearExpiry && x.Right == OptionRight.Call);
    var farCall = contracts.Single(x => x.Expiry == farExpiry && x.Right == OptionRight.Call);
    var nearPut = contracts.Single(x => x.Expiry == nearExpiry && x.Right == OptionRight.Put);
    var farPut = contracts.Single(x => x.Expiry == farExpiry && x.Right == OptionRight.Put);
    
    var legs = new List<Leg>()
    {
        Leg.Create(nearCall.Symbol, 1),
        Leg.Create(farCall.Symbol, -1),
        Leg.Create(nearPut.Symbol, -1),
        Leg.Create(farPut.Symbol, 1),
    };
    ComboMarketOrder(legs, 1);
    # Select the call and put contracts
    near_call = next(filter(lambda x: x.right == OptionRight.CALL and x.expiry == near_expiry, contracts))
    far_call = next(filter(lambda x: x.right == OptionRight.CALL and x.expiry == far_expiry, contracts))
    near_put = next(filter(lambda x: x.right == OptionRight.PUT and x.expiry == near_expiry, contracts))
    call_put = next(filter(lambda x: x.right == OptionRight.PUT and x.expiry == far_expiry, contracts))           
    
    legs = [
        Leg.create(near_call.symbol, 1),
        Leg.create(far_call.symbol, -1),
        Leg.create(near_put.symbol, -1),
        Leg.create(call_put.symbol, 1),
    ]
    self.combo_market_order(legs, 1)

Strategy Payoff

This is a delta-neutral strategy. The payoff is

$$ \begin{array}{rcll} C_{T_1}^{T_1} & = & (S_{T_1} - K)^{+}\\ P_{T_1}^{T_1} & = & (K - S_{T_1})^{+}\\ Payoff_{T_1} & = & (C_{T_1}^{T_1} - C_0^{T_1} - P_{T_1}^{T_1} + P_0^{T_1} + P_{T_1}^{T_2} - P_0^{T_2} - C_{T_1}^{T_2} + C_0^{T_2})\times m - fee\\ \end{array} $$ $$ \begin{array}{rcll} \textrm{where} & C_{T_1}^{T_1} & = & \textrm{Value of Call with expiry at T1 at time T1}\\ & C_{T_1}^{T_2} & = & \textrm{Market value of Call with expiry at T2 at time T1}\\ & P_{T_1}^{T_1} & = & \textrm{Value of Put with expiry at T1 at time T1}\\ & P_{T_1}^{T_2} & = & \textrm{Market value of Put with expiry at T2 at time T1}\\ & S_{T_1} & = & \textrm{Underlying asset price at time T1}\\ & K & = & \textrm{Strike price}\\ & Payoff_T & = & \textrm{Payout total at time T}\\ & C_0^{T_1} & = & \textrm{Market value of Call with expiry at T1 when the trade opened}\\ & C_0^{T_2} & = & \textrm{Market value of Call with expiry at T2 when the trade opened}\\ & P_0^{T_1} & = & \textrm{Market value of Put with expiry at T2 when the trade opened}\\ & P_0^{T_2} & = & \textrm{Market value of Put with expiry at T2 when the trade opened}\\ & m & = & \textrm{Contract multiplier}\\ & T & = & \textrm{Time of expiration} \end{array} $$

The following chart shows the payoff at expiration:

short jelly roll strategy payoff

The payoff is dependent on the market prices of the options, but in theory, if assuming call-put parity exists, the expected payoff would be

$$ \begin{array}{rcll} Payoff_{T_1} & = & Payoff_{put calendar spread} - Payoff_{call calendar spread} & = & D - K \times (T_2 - T_1) \times r \end{array} $$ $$ \begin{array}{rcll} \textrm{where} & r & = & \textrm{Continuous compounding interest rate}\\ & D & = & \textrm{Dividend payment during the life of the option} \end{array} $$

If the Option is American Option, there is a risk of early assignment on the contracts you sell.

Example

The following table shows the price details of the assets in the algorithm:

AssetPrice at position open ($)Price at the first expiry ($)Strike ($)
Near-expiry Call22.8023.75832.50
Near-expiry Put18.1012.85832.50
Far-expiry Call19.5024.45832.50
Far-expiry Put23.5013.70832.50
Underlying Equity-843.2500-

Therefore, the payoff is

$$ \begin{array}{rcll} Payoff_T & = & (C_{T_1}^{T_1} - C_0^{T_1} - P_{T_1}^{T_1} + P_0^{T_1} + P_{T_1}^{T_2} - P_0^{T_2} - C_{T_1}^{T_2} + C_0^{T_2})\times m - fee\\ & = & (23.75 - 22.80 - 12.85 + 18.10 + 13.70 - 23.50 - 24.45 + 19.50)\times100 - 1.00\times4\\ & = & -859.00\\ \end{array} $$

So, the strategy loses $859.

The following algorithm implements a short jelly roll Option strategy:

You can also see our Videos. You can also get in touch with us via Discord.

Did you find this page helpful?

Contribute to the documentation: