Goizueta's Jim Rosenfeld discussed reverse stock splits this week. PHOTO: Peiyu Liu/Flickr.com

Citigroup Inc. made headlines early in the week with a dramatic raise in stock price. But, according to various reports, there was no monetary gain for investors.

The Wall Street Journal reported the jump marks the first time the stock traded above $40 since 2007 — before Citi took on government support.

The leap comes thanks to a reverse split.

“Citigroup was able to ax a huge number of shares outstanding by turning every 10 shares into a single share,” writes Matt Phillips and Randall Smith in The Wall Street Journal. “Instead of trading for less than $5 a share, where Citigroup has languished despite improvements in profits and capital, the New York financial behemoth instantly became a $40 stock.”

Reverse splits have mixed results, says Goizueta’s James Rosenfeld, an associate professor of finance. He told Maria Aspan of Reuters late last week — ahead of the split — the move is designed to assist growth.

“It’s sort of a quick fix,” he said. “(It) tells me that they’re not confident they can grow themselves out of that $4 range.”

Rosenfeld and April Klein (NYU) authored a 2008 study revealing reverse stock splits “often suffer poor market and operating performance.” The professors tracked 1,600 companies that executed reverse splits over three years. They found those companies underperformed compared to similar firms by 50 percent.