Twitter announced the arrival of the new "cashtag" feature via a tweet Monday.
NEW YORK (CNNMoney) -- Attention, Wall Street tweeters: Twitter has made it easier to look at stock news.
The system works the same way as Twitter's already well-known # hashtags. Cashtags require a "$" followed by the ticker symbol.
Twitter isn't the first to come up with cashtags, though. Four-year-old StockTwits pioneered the concept and has been curating $-tagged stock information for years.
StockTwits co-founder and CEO Howard Lindzon isn't thrilled to have Twitter grabbing hold of his feature. (CNNMoney is a StockTwits media partner.)
"You can hijack a plane but it does not mean you know how to fly it," Lindzon wrote in a blog post. "In a dirty way, it's the ultimate compliment."
Twitter did not immediately respond to a request for comment.
Lindzon isn't the first Twitter developer to complain about the company muscling on trails blazed by other startups. Last year, the company launched a photo feature that competes directly with existing sites like yfrog and Twitpic.
Twitpic founder Noah Everett turned around and retaliated with Heello, a micro-messaging network with an undeniable resemblance to Twitter.
|Tesla finds friends in the FTC|
|Ex-Wal-Mart CEO Duke retired with $140 million|
|Water becoming more valuable than gold|
|How the FCC's Internet fast lane affects you|
|Postal workers protest Staples|