TSLA Puts seem to be priced with higher IV than Calls at the same distance for both near and far expiries (Calls at 120% vs. Puts at 80% of spot). I see Puts at strike $27 priced at 200% to 166% of the Calls at strike $41.

Options chains from Google Finance : http://www.google.com/finance/option_chain?q=NASDAQ:TSLA&...

So I'm assuming that the TSLA collar (unlike your other equity collars) is not costless. Or is it? Am I missing something?

Thanks for sharing your thoughts, BTW. I'm just loving going through your comments on other HN articles!

Yeh that's why I said ~15-20% - it varies with IV, I just take a different spread than exactly +/- 20%. Fundamentally I don't want to be exposed to black swan downside, and black swan upside is statistically rare - so I don't mind losing that (things don't move up 30-40% in a month too often - manias/booms are slow - but they have moved down 30-40% crashes/panics -> bull markets are slow, bear markets are fast - and that is the asymmetry I'm exploiting to cap my risk without negatively effecting my return - selling covered calls is effectively free money most of the time, and buying puts covers my ass from Enron like events and the asymmetrical movement between booms/busts/disclosure negative information like bankruptcy).

Thanks! Yes, (in my 4 years of trading experience,) I've only seen pharma stocks move up 30-40% in a month (or day!).

This is incredibly fascinating to read. Thanks for the links and insight.

But from you other posts it sounds like your expecting greater than 20% growth.

I'd just worry 20% growth could happen fairly quickly.

That's what we in finance call a good problem to have.