SEATTLE -- Microsoft raised its dividend by 15 percent on Tuesday, marking a slowdown in the growth in payouts to investors after a year marked by a downturn in computer sales and a large write-off for a failed acquisition.

The world's largest software company said it will start paying shareholders 23 cents per share each quarter from December, up from 20 cents. That is the seventh increase since it started paying a regular quarterly dividend in 2004, but is smaller than the 25 percent and 23 percent increases the two previous years.

Microsoft's yield, which shows annual dividend payments as a percentage of share price, is now about 2.9 percent, near the high end of the technology sector. Its shares dipped 0.3 percent in after-hours trading.

Microsoft, whose share price has been static for the last decade, was one of the first big tech companies to introduce a dividend, starting with an annual payout in 2003, then a special dividend and regular quarterly payments the year after.

Its new dividend yield of 2.9 percent, based on its closing share price of $31.17, compares with about 3.9 percent for Intel (INTC) and 1.6 percent for IBM, which are both long-time dividend payers.

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