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Zafgen Inc (NASDAQ:ZFGN) (The Motley Fool)
What happened: Shares of clinical-stage biopharma Zafgen (NASDAQ:ZFGN) rose more than 21% today after the company announced full-year 2017 earnings. As a development-stage company, there weren’t any important financial metrics for investors to pore over aside from the year-end cash and cash equivalents balance, which stood at $102 million. More important for investors was a slew of updates from the pipeline. Zafgen reported positive interim results from an ongoing phase 2 trial for a drug candidate being evaluated as a potential treatment for type 2 diabetes.

Advanced Micro Devices, Inc. (NASDAQ:AMD) (MarketWatch)
Shares of Advanced Micro Devices Inc. AMD, +3.87% surged 5.6% in active midday trade to pace the gainers in the PHLX Semiconductor Index SOX, -0.13% and to buck the sharp selloffs in the chip sector and broader stock market. The chip sector tracker (SOX) fell 0.7% and the S&P 500 SPX, -0.63% shed 0.9%. AMD’s trading volume neared 90 million shares, compared with the full-day average of about 60 million shares, according to FactSet, and enough to make the stock the most actively traded on major U.S. exchanges.

Dollar Tree, Inc. (NASDAQ:DLTR) (Benzinga)
Dollar Tree, Inc. dropped 15.9 percent to $87.81 after the company posted downbeat quarterly earnings and issued a weak forecast.

Ross Stores, Inc. (NASDAQ:ROST) (CNBC)
Ross Stores – The off-price retailer reported quarterly earnings and revenue that beat analysts’ expectations. Same-store sales, a key metric for retailers, rose 5 percent in the previous quarter, surpassing an expected gain of 3.1 percent.

Netflix, Inc. (NASDAQ:NFLX) (Barron’s)
Shares of Netflix (NFLX) are down $3.40, or 1%, at $321.82, after Stifel Nicolaus’s Scott Devitt this morning cut his rating on the stock to Hold from Buy, even though he raises his price target to $325 from $283, writing that the share price “may have sprinted ahead of fundamentals in the short-term.” “Netflix shares are up by nearly +70% YTD (versus the S&P 500 up +2% YTD), following a +55% move in 2017.” The downgrade follows several price target increases the last couple days.