Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

• Cryptocurrency-linked stocks are rallying in premarket trading, set to extend gains, after US SEC greenlit digital versions of securities to start trading in the US.
•   Netflix (NFLX) received its first bearish analyst rating in months on Friday, after Wells Fargo Securities downgraded the streaming-video company to underweight, citing concerns about user engagement.
• Nucor (NUE) shares fall after the steel producer’s third-quarter earnings-per-share forecast missed the average analyst estimate. Analysts note that the forecast might prove to be conservative.