Analyst Downgrades: GoPro, Diana Shipping, Seattle Genetics

Analysts are weighing in on action camera seller GoPro Inc (NASDAQ:GPRO), transportation services provider Diana Shipping Inc. (NYSE:DSX), and biotech Seattle Genetics, Inc. (NASDAQ:SGEN). Here's a quick roundup of today's bearish brokerage notes on GPRO, DSX, and SGEN.

• GPRO has fallen 8% to an all-time low of $19.20, after Piper Jaffray slashed its price target by $5 to $15, saying the company may face "difficulty maintaining current margin expectations." This should cheer the spirits of option bears, who have been betting at a feverish pace in recent weeks. Specifically, GoPro Inc's 10-day International Securities Exchange (ISE), Chicago Board Options Exchange (CBOE), and NASDAQ OMX PHLX (PHLX) put/call volume ratio of 0.94 registers above all but 6% of comparable readings taken in the past year.

• Deutsche Bank chimed in on a a number of bulk shippers overnight, and for DSX, that meant a downgrade to "hold" from "buy," as well as a price-target cut to $4 from $10.50. The brokerage firm expressed concerns that the industry could face pressure over the next few months related to liquidity. On the charts, 2015 has been ugly for Diana Shipping Inc., which has surrendered 6.5% this morning to hit a record low of $4.90. In options land, traders have been scooping up bearish bets over bullish at an extreme rate over the past few months. DSX's 50-day ISE/CBOE/PHLX put/call volume ratio of 0.93 sits above all other comparable readings from the prior 52 weeks.

• SGEN has plunged 2.1% out of the gate at $44.33, after Goldman Sachs (which has been busy this morning) started coverage with a "sell" rating and $33 price target -- territory last explored on May 1. Nonetheless, on a year-to-date basis, the equity remains 38% higher. One group that's hoping for a sustained pullback is short sellers. A lofty 15.8% of Seattle Genetics, Inc.'s float is sold short, or nearly four weeks' worth of trading activity, at the stock's typical daily volumes.