Apple Inc. (NASDAQ:AAPL) could announce a stock split at its shareholder meeting tomorrow — at least that’s the rumor being circulated thanks to a single tweet.

TheStreet contributor Douglas Kass tweeted the rumor this afternoon, saying, “High above the Alps my Gnome is hearing a rumor that Apple Inc. (NASDAQ:AAPL) will announce a stock split at tomorrow’s shareholder meeting.”

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Rumors about a stock split have been circling for quite some time. They gained traction briefly last summer, before fading away again. Shares of Apple Inc. (NASDAQ:AAPL) jumped 1 percent after Kass’ tweet, turning around a decline that took the stock below $440 per share today.

Kass also continued to tweet about the rumored split, and other Twitter users also jumped into the discussion about a possible stock split at Apple Inc. (NASDAQ:AAPL).

Various numbers were floated on the amount of the split. Some users questioned if it was a one for 10 split, while others tweeted about what a 2 for 1 split would do for the stock.

Of course investors should keep in mind that this is just a rumor at this point, and Kass himself says he holds a long position in Apple, and he’s the only one reporting this rumored stock split. He also neglects to disclose his source.

And as 9to5 Mac reminds us, Kass has tweeted other things in the past that didn’t turn out to be true, like a rumor he said he heard about Google Inc (NASDAQ:GOOG) CEO Eric Schmidt entering into “low-level discussions” about temporarily replacing Steve Jobs if “the options-backdating issues intensify at legal levels.”