Quote from deltahedge:
NFLX offers an amazing service at an attractive price for movielovers. However, their current stock price is ridiculous given the growth outlook and actual FCF generation. Of course the saying remains true that "the market can stay irrational longer than you remain solvent" so this is simply a tale of (as someone mentioned earlier) the chartists going long and trading and the value guys saying "screw this crap" and idiot ballsy retail traders who think their 100 share short will be proven right.
If you want to make a downside bet on NFLX do a put ratio spread (3-5 months out) for a small net debit. Yeah, you'll tie up some margin but at least you won't lose some significant capital and be cursing at the monitor the entire day.