Options Position Sizing and Alternatives to Iron Butterfly Trades

# Scaling an Options Trade: How Much Risk is Too Much?


# Scaling an Options Trade: How Much Risk is Too Much?












I'm considering an Iron Butterfly trade (`+105P, -130P, -130C, +155C`), which has a net credit. Based on max loss calculations at expiration, if held to expiration, I lock in a $1,000 profit per contract.

That got me thinking: How much should I scale? Should I enter two contracts? Ten? One hundred?

Obviously, scaling without understanding the risks would be reckless. The key concerns:













### Historical Precedents:

- Black Monday (1987): Rapid declines led to massive margin calls, forcing liquidations at the worst prices.

- Archegos (2021): Over-leveraged positions triggered forced liquidations across banks, exacerbating market instability.

### The Question:

How do professional traders determine the optimal scaling for options strategies like this? Is there a rule of thumb for how much size is too much before risks become unmanageable?

## Answer by Dr. Michael J. Stefano (score 1)

https://quant.stackexchange.com/a/85327

4 leg strategies will always be more risky for any or all of those reasons you are clearly familiar with even if your broker platform provides for them to be executed as a spread going in and out, which most do, and will get you on bid/ask spreads unless on only the most liquid of underlyings, such as SPY or the MAG 7. i would suggest considering another non-directional strategy that can benefit from theta decay, such as a put calendar with a long dated long put 3- 6 months out, limiting position size based on the cash secured margin you would need for the short put if assigned. as long as you are covered in that regard, there will be no fill risk or margin call issues with short put assignment. you will be assigned long shares per the strike price of the short put contract, and already have your long put protection. so if a short put is sold to open prior to earnings and the long put is after earnings, theta will be positive for the spread, and the long dated option may benefit from IV expansion. the P/L gives you a similar butterfly or tent graph, and while perhaps not as cheap as the butterfly, and while it will have a lower return risk ratio initially, if you sold the current monthly and bought 3-6 months out, you would then have a serial calendar allowing you additional time to make up for the additional net debit. if assigned, and price is outside the net equity break even, then you would hold the long put and shares and overwrite a call in the next monthly. any IV expansion would help your long put and allow for higher short call premium to be sold. if the short put is unassigned, then hold the long put and determine a strike for another short put. other adjustments include: if assigned shares, close/roll the long put for profit down to the ATM strike and then overwrite the monthly call ATM. if short put is unassigned due to price increase: consider rolling the long put up to the money. the cost will be disproportionately cheap in your favor for the increase in strike price, which will then allow you to sell the new monthly ATM put for the most time premium without increasing the margin/risk that would be associated with a diagonal put if you sold ATM and kept the original lower strike long put. this would just be considered additional capital added to your serial position, but will be less than the margin/risk added by NOT rolling up the long put. you will likely be covering a disproportionately favorable portion of that additional long put cost with the new short put. 6 month long dated puts have a much lower average per day cost than shorter terms and a theta that is even lower than the average cost per day, making them relatively cheaper and giving you more time to roll/adjust for changes in price direction. the spread can be adjusted as often as one liked to keep it delta neutral but i like to wait for the short expiration so as not to buy back any short premium, especially since i do NOT need to be concerned about the risks and costs of assignment. one could also scale-in another calendar at or near the calendar break-even points. it is also of note that ATM put calendars will be cheaper than the corresponding call calendars much of the time, and I would rather manage a short put assignment of long shares than have short shares assigned to me. finally, one additional enhancement is to buy the shares outright, in 100 shares lots, thereby managing scale from the get go, and then create an ATM "time" or "calendar" collar, whose P/L will be similar to a put calendar. since call premiums will typically be higher than put premiums at ATM strikes to account for the risk free rate you are giving up by buying the shares, the P/L range is wider and the roi is higher than with the put calendar, and then you can skip having to try to manage t-bills with the cash secured margin before short expiration. the risk free rate will be built into the short call premium. there are no scale or fill risks. if assigned/called away, you have a gain from the buy write and then adjust as noted above for a put calendar.(roll up the long put and sell to open new monthly ATM put). if unassigned, hold shares and long put and consider the next call overwrite as noted above for the put calendar where the short put got assigned to you. the short option theta will always be higher than the long side even when the term structure is in contango giving you that advantage. some people consider doing this pre earnings when the term structure is in backwardation, greatly increasing the breakeven range and the roi, as long as you are prepared to do the serial adjustments if price moves beyond your breakevens. you will get a big jump on the serial cost of the spread, and IV crush post earnings will be significantly less on the longer dated option. you could consider doing this on assets that historically have less statistical/realized volatility for a lower roi but perhaps a higher probability of staying within the break-evens. my platform does NOT allow a collar to be put on all at once, so I first get the fill on the protected put and then overwrite the call for safety.