DXCM – Hard to Understand a $90 Drop and how we responded

Dexcom announced excellent quarterly results…..which resulted in a $90 drop in the stock price. I copied the earnings announcement at the bottom of the post.

How to react when one of our stock implodes …..

The “covered call” offered some protection (it was sold for $28.82 a share or $57,640 on 10/16) but the drop (2,000 shares x $90) resulted in losses far beyond what the call premium could offset.

Dexcom has a history of big swings around earnings so we expected some volatility but nothing this extreme. Based on the earnings announcement and content of the call we decided to purchase more shares as it dropped. We purchased shares at $349 when we started to see a bounce…..but we should have waited as the stock bounce was short lived and hit a bottom just over $330. The stock did bounce back from the bottom to $349 by the end of the day. We don’t anticipate hanging onto the incremental shares but selling if the shares continue the upward trend.

We also rolled our 20 Nov 20 $410 Call options to Dec 18 $370 Calls for a credit of $18.22. Things were happening very quickly when I did the roll down…..and the Schwab system defaulted the Dec 18 option into the Diagonal Roll template when I thought it was Nov 20 option. I didn’t notice the Dec date until the confirmation came in. I might roll this back to Nov 20 today as I feel the stock will come back over the next couple of weeks.

It is hard to watch a position devolve and see tens of thousands of dollars disappear from your account. Knowing how you will react helps…..but it is still tough emotionally….and makes you wonder what else you should have done to prevent the loss.

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