New Products Are Changing How Stocks Trade

08/04/2010 12:01 am EST


Steven Place


If you haven’t yet noticed, weekly options have been released on a bucket of names, and it’s changing how the stocks trade at the end of the week, as well as the options expiration cycle. My dream was fulfilled when weeklies were opened up for a variety of names, and it appears that new listings open up every few weeks. You can see the specs here (at the CBOE) as well as a full listing of options here (Excel spreadsheet from CBOE).

So how does this change the options pinning effect at options expiration? To refresh your memory, “pinning” is an effect where the supply and demand of a stock oscillate around a particular price point that is associated with an option strike price that has very high open interest relative to the volume of shares traded.

Weekly options are providing short-term option traders a different vehicle than regular monthlies; instead of waiting for the near-term gamma and theta characteristics to come through on monthly options, you can now play with weekly “hand grenades.” For instance, the Goldman Sachs (GS) 150 weekly call last Friday traded from .32 to around 3.50– not bad for a daily percentage! So there has been widespread adoption of some names, as seen in the daily trading volume and OI on the board.

This in turn will reduce the overall open interest on the monthlies. Because of this, pinning effects will be less prevalent during options expiration. This, in my opinion, is a good thing because now the true supply and demand of a stock will be realized more quickly, and could potentially reduce weekend “gappiness” of a name.

Of course, there is a tradeoff: We are starting to see pinning action on weekly options. Notice how Apple (AAPL) traded around $260 over the past two weeks. While it didn’t actually “pin,” this price point was a strong support and resistance level, and I believe it was reinforced by the vested interest many traders had around the 260 strike on AAPL. I’ve seen similar action in Google (GOOG) and (AMZN) due to the introduction of weekly options.

These instruments are very new, and I’m expecting to see further adoption through the end of the year. There are trading strategies available now that should definitely be worth your consideration if you do trade these, but that is a subject for another article.

By Steven Place, option trader and blogger,
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