Hi, I am new to option trading. I learned that by buying a call and selling a put at same strike price will simulate a long position. Does that strategy work? Is there any implicit risks of this strategy?
The risk profile is the same as when you are buying the shares. The additional risk is no different than any options trade. Because setting up a short put/long call can be done for small debit, zero or even credit and despite the margin requirement, its easy to over-dimension such a trade. Always remember that you are buying 100 shares in such a synthetic stock position per option. So if you buy 10 calls/short 10 puts of amazon you are effectively on the hook to buy 1000 shares of Amazon i.e. you have exposure on 1,000,000$ (more or less). A 20% drop in Amazon therefore translates as a loss of 200,000$ be sure your account can take that before you trade that way.
As someone posted above you must only do this for shares you want to own and I wouldnt really recommend it for shares that pay out hefty dividends because you might be unexpectedly assigned. I currently have one such position open for Monsanto. I happen to believe the take-over by Bayer will happen but - as the merging parties themselves stated - regulatory approval is not due before end Q3/Q4 2017 maybe slightly later. In the mean time - and particularly early on - the share price of Monsanto wasnt going anywhere near the 128$ bid by Bayer.
So with that in view my trade was opened as follows:
2016/10/25
OB 5 C MON JAN18 100 @ 11.15$
OS 5 P MON JAN18 100 @ 10.10$
Net cost $ 525 + Commission - the margin requirement was about 8000$, for a position worth about 50K Monsanto which is the maximum I would feel comfortable owning
By 2017/2/28 Monsanto had risen to about 115$ so there was a lot of money in the position. I decided to move up.
CS 5 C MON JAN18 100 @ 17.00$
CB 5 P MON JAN18 100 @ 4.40$
OB 5 C MON JAN18 115 @ 7.10$
OS 5 P MON JAN18 115@ 6.40$
Net credit ca, $5,500 minus commissions. The margin requirement was no a little larger at 9000$ and the position represented $57,500 of Monsanto stock.
By July 2017 things had changed again - however by this time (this was already a little the case in February) it was becoming harder to sell the put side as the market just wasnt there and the spread was murder. I also felt the short position was not giving me enough in relation to the margin requirement and risk. So I changed again:
CB 5 P MON JAN 18 115@ 4.35$
OS 5 P MON JAN 18 120@ 6.25$
So that added another 500 bucks to the credit. This was a more aggressive move as MON traded at 115 at that moment so I was barely getting what the value was in the money. Right now its even harder to sell puts even ITM because the market is following the expectation the deal will take place. The position is now as follows:
5 C MON JAN18 115 @ 8.20$
-5 P MON JAN18 120 @ 1.60$
Now its not quite a pure synthetic stock position but the effect is more or less the same to having exposure to 500 MON shares. The position in total is now up $9000 more or less on a cash outlay a year ago of 500$ and about 9K in Margin being held throughout by the broker. Pretty much up 100% on a year ago - if I had purchased 500 shares of Monsanto I would be up $12000 (including dividends) that would - however - have required a 50K investment and therefore the return would be 25% not 100%.
As you can see this can work out rather well and you can exit some cash at different points if the position is in the money. Its also true that in the event of a huge drawdown there is some buffering from the long call position as the change in delta would reduce (a little) the damage on the call side compared to a long stock position. The downsides are you get no dividends and you have to be careful about the liquidity - a reason to move the position up or down is to stay near the money where the options are likely to be more liquid. And never forget that your exposure is a 100 multiple of the options. I would never have taken the above position if I had not been confident that even in the event of the merger falling through, Monsanto wouldnt crash far below 90$.