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Why do companies split their stock? Am I really gaining anything as a shareholder when they do this? -A.V.

This is a timely question, because after a long dry spell we've recently seen several companies split their shares. Last week, pipeline operator Enbridge Inc. split its shares two-for-one - its first split since May, 2005. Others that have announced splits in recent months include Lululemon Athletica Inc., Potash Corp. of Saskatchewan and Magna International Inc.

The main reason companies split their shares is to make the price more attractive for retail investors.

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The theory is that people are more likely to buy a board lot of 100 shares if the price is, say, $50, instead of $100. A company may also authorize a split to increase the liquidity of its stock.

In addition, Enbridge said it "believes the split will keep the trading range of ENB shares better aligned with Enbridge peers in the energy infrastructure business."

Do you gain anything as a shareholder from a split? The short answer is not really. You'll have twice as many shares, but they'll be worth half as much, so you'll be no better off.

While a split does not in and of itself add economic value, it can be a positive sign for the future.

In a 1996 study, David Ikenberry of Rice University studied the short- and long-term returns of 1,275 companies that split their stock two-for-one from 1975 to 1990. He then compared their performance to companies that did not split.

Result: The splitters outperformed the non-splitters by eight percentage points after one year, on average, and by 16 percentage points after three years.

In a later research paper, Prof. Ikenberry - who is now with the University of Colorado - studied companies that split their stocks two-for-one, three-for-one and four-for-one from 1990 to 1997. The results were similar: The splitters again outperformed by eight percentage points after one year, and 12 percentage points after three years.

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Profit Growth

There's also some evidence that a stock split is a predictor of earnings growth. According to a 2003 study of Canadian stocks from 1977 to 1993 by Said Elfakhani of American University of Beirut and Trevor Lung of San Diego-based First National Home Finance, "it appears that earnings grow in the two-year period following split events, thus implying that split events signal future performance of the firm."

When you think about it, it makes sense that companies that split do well. After all, a split is usually preceded by a sizable rise in price, which often reflects a company's strong or improving fundamentals. Assuming the company continues to perform well, the stock will rise.

It's also possible that the lower price after a split attracts more investors, who push up the value of the shares. Yet another explanation for the phenomenon is that many companies announce dividend increases and other positive news when they split their shares, and this drives up the price.

Berkshire and Buffett

Still, not every company is a fan of stock splits. Google Inc., for example, has never split its stock. And Warren Buffett's Berkshire Hathaway Inc. resisted until last year, when it split its class B shares 50-to-1 to facilitate the purchase of Burlington Northern Santa Fe Corp. Berkshire's class A shares, however, have never split and trade at a vertiginous $112,120 (U.S.).

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Mr. Buffett has said he preferred not to split Berkshire's stock because it helped him attract "the best shareholders" - people who don't watch the stock price from day to day but are investing for the long haul.

The opposite of a split is stock consolidation, also known as a reverse split. For example, in a 1-for-10 consolidation, an investor who owns 1,000 shares worth $1 each would end up with 100 shares worth $10 each. Reverse splits are sometimes initiated to raise a company's share price if it is in danger of being delisted by a stock exchange, or to make the stock more attractive to investors who may be reluctant to invest in very low-priced shares.

Reverse splits are often associated with companies in financial trouble. One example is U.S. insurer American International Group Inc., which in 2009 did a 1-for-20 reverse stock split.

There are many factors to consider when buying a stock. But if a company has a history of splitting its shares - particularly in combination with a rising long-term trend in profits and dividends - it can often be a positive sign.

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About the Author
Investment Reporter and Columnist

John Heinzl has been writing about business and investing since 1990. A native of Hamilton, he earned a master's degree from the University of Western Ontario's Graduate School of Journalism and completed the Canadian Securities Course with honours. More

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