Nike says its fourth-quarter net income fell 8 per cent as restructuring charges and higher raw material costs offset price increases that helped boost its revenue.

In a rare circumstance for the world's largest athletic shoe and clothing company, the results the company reported on Thursday missed expectations, and its shares sank almost 10 per cent after hours.

Nike said its net income fell to $US549 million, or $US1.17 per share, compared with $US594 million, or $US1.24 per share, a year earlier. Analysts were expecting $US1.37 per share.

Its revenue rose 12 per cent to $US6.47 billion, while analysts expected $US6.51 billion.

Nike Inc has beaten analysts' expectations in 17 of the past 18 quarters.