Doug Kass' summer Twitter vacation is over.
The widely followed hedge fund manager at Seabreeze Partners Management made a noisy exit from Twitter in June, when he said a barrage of hateful comments made participating in the microblogging site more trouble than it was worth.
Here's how he broke the news then:
This week, though, Kass has come back, posting a series of otherwise routine tweets on his market observations.
(Read more: Apple is now a no-growth 'value trap': Doug Kass)
A late-afternoon observation, though, showed that he likely will continue to be a lightning rod:
In an email exchange, Kass said he's giving Twitter another whirl so long as things don't get out of hand.
"Trial run, doing it in moderation. Blocked haters. We will see..." he said.
(Read more: Carl Icahn's tweets help boost shares of Nuance)
Carl Icahn has been one of the site's most noted new tweeters, moving stocks on several occasions even though the activist investors only occasionally posts.
Asked if Icahn's presence influenced his decision, Kass said, "I would say he had a moderate influence. But I decided to again do it on a limited basis—not to be as engaged as I was in the past. It is a legitimate platform/forum for discourse.. when it is civil."
—By CNBC's Jeff Cox. Follow him on Twitter