Netflix (NFLX) shares fell more than 5% in heavy volume on Wednesday on media reports that data analytics firm M Science said the video-streamer's churn suggests co will not add any paid U.S. subscribers in Q3NFLX hit $93.26 session low around midday before paring losses. Stock closed down 3.4% at $94.88 on about 20 mln shares, nearly triple the 30-day avg volumeM Science cites continued migration of grandfathered subscribers to $9.99 per month pricing, estimates churn rate could have been as high as 5.8% in July and AugustPoints out that Netflix forecast 400,000 paid U.S subscriber additions for Q3, while Street expects 351,000 such additionsNetflix due to report quarterly results on Oct 17Back in July, NFLX's stock suffered its worst plunge in nearly 2 years after co's Q2 report and forecast heightened worries about subscriber growth.Actually, no US paid subscribers at all in Q3 sounds like a little bit extreme forecast, but definitely Netflix heyday of subscriber growth is behind us. I think its valuation is unjustified and will be looking for opportunities to short the stock. $NFLX, Netflix, Inc. / 1440