When is too many options, too many?

The conversation seems to have devolved a bit.
But here's a pull from yesterday afternoon.

SPXvol_OIJan18pmCapture.PNG


Make of it what you will.
 
I occasionally play around with options on equities, usually highly liquid stocks (i.e., Facebook, Google, etc.). I purchase and hold for usually a week to a couple of months (not day trading).

When trading 1, 5, even 10 options... it's not a significant issue. But as I trade more and more options, I'm starting to be curious if there is a point that I need to change 'how' I trade?

For example, I was looking at a volume chart on options that traded during the week, and volume is relatively low (averaging 5 on a trade, maybe 40 a day). Except when I did a single trade of 50 options, there is a rather large spike. Such that I can actually see my own personal trade on a volume chart, as it stands out significantly.

To make things more interesting, it seems I'm the majority of open interest on that specific option.

So far, not a big issue.. but as I move to larger purchases (100, 1000, etc.) do I need to change HOW I trade these options? Some of my concerns:

1) Will I personally exhaust liquidity on the option if my trade is 100x the average trade?
2) Will I inadvertently effect the price due to the larger purchases?
3) Am I going to end up being flagged on CNBC by the Najarian brothers who think I actually know what I'm doing?

I am unaware exactly how I can change my trading mechanism. I do not mean making multiple purchases of smaller lots, but do concepts exist for options such as:

1) Blocktrades?
2) Darkpools?
3) Something else?

Or should I just not even consider executing trades where I end up being 99% of open interest?

Any ideas/feedback/suggestions would be greatly appreciated!

Thank you!
It is very interesting to find someone having similar problems.

From my experience, in thinly traded options, all bid/ask are put up by MM. If my trading volume was much greater than MM's bid/ask quantities, I moved the market. It is also true that when I held most OI, in a jam I often could not find anyone to trade with unless I gave my position away.

I am just a mom and pop retail trader so could be doing it all wrong. I like some feedback and coaching too.
 
There are a couple of things to consider overall.

How liquid is the underlying.
Is the option multiply listed.
Am on planning on exiting early or for some specific event.
Thinly traded and low open interest are GENERALLY more of a concern at exit than entry.

Good liquidity in the underling and multiple listing is a plus a huge plus. Multiple listing and thinly traded don't really go hand in hand, but names often go from unpopular to popular for some event and vice versa.
There isn't much liquidity outside of the top 10 or 20 names based on screen markets and it generally worse on down days.
Can your broker's trading desk algo an order so it hit's multiple markets when you want to exit?
If you need to get out of 100 contracts - hit the top of the book on 10 exchanges - your transaction costs may go up,but your overall friction may be a lot lower. Of course it needs to listed on 10 exchanges for that to work.
 
If you need to get out of 100 contracts - hit the top of the book on 10 exchanges - your transaction costs may go up,but your overall friction may be a lot lower. Of course it needs to listed on 10 exchanges for that to work.
How do I do that?
 
Not a fan of the way that they trade on OptionAlpha, but in terms of theorizing about Option Trading in an easy-to-understand manner, they are a good resource and have a podcast episode about trading illiquid options here:

 
Are you in fact trading several thousand a pop or is it just hypothetical ? Often easier to get several thousand done because an institutional broker will facilitate and tie the trade to stock. Again you increase you transaction costs, but lower your friction overall.
You'll need an institutional brokerage relationship established. So you'll need a level of activity and capital that interests them. The interest issue will be key so it will depend a lot on the other business you bring. Your order becomes a qualified contingent cross. About 75% of all trades 1000 or more are QCCs. Very name dependent.
 
"Me? Perhaps 5-10% of that at most. Are you telling me is if I trade over 100, I should talk to my broker?"

Hypothetically yes if you having a challenge sourcing liquidity, but it only hypothetical.
 
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