Trading options for multiple symbols by Christian Lauer

Christian Lauer

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Hello everyone,

I took a look into options on Quantconnect and found the introductory tutorials really helpful. All of these examples trade only options for one symbol though. I'd like to try something with multiple symbols but I don't know how to do that with the Slice class. Could someone maybe post any such algorithm? A simple one like the first example just with two or three symbols would do. Thank you in advance.

Kind regards,

Christian

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Jing Wu

You can add multiple options with a list of underlying tickers and save the option symbols in a new list.

for ticker in ["IBM", "AAPL"]:
option = self.AddOption(ticker)
self.symbols.append(option.Symbol)
option.SetFilter(-2, +2, timedelta(0), timedelta(180))

In OnData(self, slice), you can get the option chain for the specified symbol with

for symbol in self.symbols:
for kvp in slice.OptionChains:
if kvp.Key == symbol:
chain = kvp.Value

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Christian Lauer

959 ,

Thank you very much for your answer, Jing! I have another question: How do I access the prices of the options in my portfolio? Let's say I'd like to sell the options bought by your algorithm when their current price is 10 percent higher than the price they were bought for.

Kind regards,

Christian

Jing Wu

We have quoteBar(with bid/ask) data for options. There are a few methods to get the option contract price:

contract = contracts[0]

contract_symbol = contracts[0].Symbol

1) self.Securities[contract_symbol].Price returns the mid-price = (bid+ask)/2

2) contracts.AskPrice / contracts.BidPrice returns the ask/bid price.

3) The order is filled based on bid/ask price. If you are selling a stock, you are going to get the bid price, if you are buying a stock you are going to get the ask price.

You can get the order filling price with

ticket = self.MarketOrder(symbol, 1) 

fill_price = ticket.AverageFillPrice

Then you can place a limit sell order to sell the contract when their current price is 10 percent higher than the price they were bought for.

self.LimitOrder(contract_symbol, -1, fill_price*1.1)

For details about limit orders, please refer to this algorithm

https://github.com/QuantConnect/Lean/blob/master/Algorithm.Python/OrderTicketDemoAlgorithm.py

Christian Lauer

959 ,

Hello Jing,

thank you very much for your answer! It's working now. I have another question concerning the algorithm you posted: You use the line

if self.Portfolio.Invested: return

If I remove this. There are multiple trades for the same symbol. Why is that? Shouldn't

if not self.Portfolio[symbol].Invested:

prevent the algorithm from odering if the option for that symbol is already in the portfolio? I need to remove the first line but I only want each option once, so I need to fix this.

Kind regards,

Christian

Jing Wu

"if self.Portfolio.Invested: return" means if there are any positions in your portfolio invested, the code after this line will not be executed in the current time slice.

"if not self.Portfolio[symbol].Invested" specified the symbol, it returns the boolean value to decide if there are holdings for this symbol in the portfolio.

To just show you a simple example. I added this line "if self.Portfolio.Invested: return" so the code for option contract selection part won't be executed each minute to speed up the algorithm.

Christian Lauer

959 ,

Hello Jing,

thank you for your answer. My issue is that I want to have each option only once in my portfolio. When removing the line "if self.Portfolio.Invested: return" like in the attached backtest, this is not the case anymore. I thought to achieve this by using "if not self.Portfolio[symbol].Invested" which should be false so that the following code should not be executed if already invested in that stock but apparantly this is not the case. So what do I have to change?

Jing Wu

You can get a list of all option holdings in the portfolio and check if the underlying asset of the invested contract equals the symbol. Please see the attached algorithm

option_invested = [x.Key for x in self.Portfolio if x.Value.Invested and x.Value.Type==SecurityType.Option]

for symbol in self.symbols:

    invested = [option for option in option_invested if option.Underlying == symbol.Underlying]

    if len(invested) > 0: return 

    for kvp in slice.OptionChains:

     ####

Christian Lauer

959 ,

Hello Jing,

thank you for your help again!

if len(invested) > 0: return

works fine to avoid selling the same option twice. Now I need a buying condition too. I think here something like

if self.Portfolio[contract_symbol].Invested:

is also not working properly. (When checking the logs of my algorithm it should log every invested symbol every minute which it is not doing.) Which line should be used instead?

Also I wonder whether it's possible to create only one option chain for all symbols and then invest in the first ten or something after it's been sorted by certain criteria. How would I have to modify my algorithm in order to do that?

Kind regards,

Christian

Jing Wu

1) After you trade the option contract for a specified symbol, In the next time step, you filtered the contract again. "contracts" might change in the next time step, then "contract_symbol" might change as well. If you use "self.Portfolio[contract_symbol].Invested", you can not guarantee "contract_symbol" here is still the contract when you place the order with "self.MarketOrder(contract_symbol, -1)". You can save the contract you've already invested in a dictionary (keyed by the underlying symbol) once you place the order over it and use this symbol to decide "if self.Portfolio[contract_symbol].Invested". Otherwise, contract_symbol might change over time because you filtered the contract at each time step.

# check this part of your code, contract_symbol might change over time  

contracts = sorted(sorted(sorted(contracts_iv, 

                   key = lambda x: -x.AskPrice/(x.AskPrice+

                   max(20*chain.Underlying.Price - (chain.Underlying.Price - x.Strike), 10*x.Strike))),

                   key = lambda x: x.Expiry, reverse=True),

                   key = lambda x: x.Right, reverse=True)



if len(contracts) == 0: continue

contract_symbol = contracts[0].Symbol

symbol = contracts[0].Symbol

if self.Portfolio[contract_symbol].Invested:

     self.Debug()

self.Portfolio[contrat_symbol].IsLong and self.Portfolio[contrat_symbol].IsShort can help you decide if it is a long or short position in your portfolio.

2) You can save option contracts for all the underlying symbols in a list and sort them by your criteria.

all_contracts = []

for i in self.symbols:

    # get a list of contracts for the specified underlying asset

    chain = slice.OptionChains.GetValue(i)

    if chain is None: return

    all_contracts += chain

, , edit

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