Following the publication Thursday of a Seeking Alpha article criticizing Stamps.com (STMP), which helped pull shares of the online postage site down 11.5% on the day, Martin Shkreli chimed in on Twitter, questioning the soundness of the analysis.
Thinking about buying more $STMP on the trash SeekingAlpha analysis¿ Martin Shkreli (@MartinShkreli) April 28, 2016
Shkreli, the former CEO of MSMB Capital Management, who was arrested in December on fraud charges, was also a vocal Twitter commentator Wednesday, as Valeant's (VRX) departing CEO testified before the Senate over charges of unreasonable drug pricing.
Shkreli was arrested following an investigation over similar allegations by the same Senate panel, after the FBI concluded he used funds from Retrophin, the pharmaceutical company he founded in 2011, to pay off investments in his MSMB Capital fund.
The Seeking Alpha article, titled "Stamps.com: A Lousy Piece of Ship," argued that customers will abandon the online-postage website as the regulators probe so-called "misleading" advertising practices.
Meanwhile, investment giant BlackRock (BLK) tweeted Thursday about the value of applying the global slowdown in manufacturing.to gauge the potential of a macroeconomic recession.
Why investors should pay attention to sluggish manufacturing https://t.co/3w7YmeLc6c¿ BlackRock® (@blackrock) April 28, 2016
"In short, future gains in stocks depend on an upturn in earnings growth," the company said in a linked-to report. "In the meantime, investors ignore the manufacturing recession at their own risk."
Invesco (IVZ) also took to Twitter Thursday, questioning the value of debt held by metal and mining companies as commodity prices have shown signs of rising.