Here's the entire paragraph for you all to read:
"Several courts addressing alleged market manipulations under Rule 10b-5 have reinforced the idea that manipulation claims require some inherently deceptive conduct. The Northern District of Illinois stated in In re Olympia Brewing Co. Sec. Litigation that "[r]egardless of whether market manipulation is achieved through deceptive trading activities or deceptive statements as to the issuing corporation's value, it is clear that the essential element of the claim is that inaccurate information is being injected into the marketplace." The deceptive trading practices alleged by the plaintiffs in Olympia Brewing included naked short selling, the taking of substantial short positions, and concerted end of day trading allegedly designed to lower the market price. In that case, the court held that the defendant's aggressive short sales were not manipulative under Rule 10b-5, because they did not inject artificial information into the marketplace. The court reached that conclusion not on the basis that aggressive short sales cannot be manipulative, but rather that in this case the defendant acted on his genuine belief that the shares were overpriced, and that any resulting decline in the market price was a natural and appropriate result. Accordingly, the court granted the defendant's motion for summary judgment. However, although Olympia Brewing has been cited for the above propositions, its extension to other scenarios may be inappropriate because here the defendant engaged in no other transactions at all; the defendant argued that he sold the stock short because he believed it was overpriced, and there was no evidence to suggest any other motive, nor did the price-moving short sales benefit any other positions. Thus, citing Olympia Brewing for the proposition that short sales cannot be manipulative in themselves is inapposite."
Unless English is not your first language this is very clearly stating that the information injected into the market was not deceptive because the defendant believed the price was too low and therefore was not guilty of manipulation.