Sony Corp fell into the red in the latest quarter and reiterated its forecast for a record annual loss due to sliding demand and a stronger yen, while rival Nintendo Company cut its full-year outlook for the second time in three months.

Nintendo posted a 21 percent rise in operating profit for the October-December quarter, benefiting from strong holiday sales of its Wii game console and DS handheld game player and proving its resilience in the face of an economic slump.

But the video game maker cut its profit forecast for the year to March by a much larger-than-expected 16 percent while lowering its sales target for the Wii slightly, a move that could raise worries over its growth potential.

'It will be a major shock for Nintendo bulls out there if they are reducing Wii unit guidance because people expect this to go up,' said Hiroshi Kamide of KBC Securities.

Nintendo's new operating profit forecast of 530 billion yen ($5.9 billion) for the year to March would still be a record figure, a sharp contrast to Sony, which is heading for its biggest operating loss on record and its first in 14 years.

Nintendo's strategy to broaden the gaming population by offering innovative but easy-to-play games has been a roaring success, with the Wii far outselling Sony's PlayStation 3 and Microsoft Corp's Xbox 360 since its debut in 2006.

Sony has been battered by falling prices and slumping demand for flat TVs, digital cameras and other electronics products, while also having to shoulder massive costs to close factories and cut jobs.

The maker of Bravia LCD TVs and Cyber-shot digital cameras reiterated a forecast unveiled last week for a record 260 billion yen ($2.9 billion) operating loss for the year to March, a big swing from the 475 billion yen profit logged a year earlier.

As inventories pile up and prices tumble, Sony is feeling the pinch of the downturn in every corner of its operations, which range from semiconductors to movies and insurance.

Sony reported an operating loss of 18 billion yen for the three months to December, down from a 236.2 billion yen profit a year earlier and joining other technology heavyweights such as Samsung in posting a quarterly loss.

October-December group operating profit at Nintendo rose to 249.2 billion from 205.3 billion yen a year earlier. The result was roughly in-line with the average of 247.9 billion yen from four analysts surveyed by Reuters.

But Nintendo cut its full-year outlook by 100 billion yen to 530 billion yen, far below the market consensus of 604 billion yen from a poll of 18 analysts by Reuters Estimates.

Nintendo's outlook has been tempered by a rising yen, which makes its consoles less competitive and cuts into the value of overseas earnings. Nintendo gets more than three-quarters of its sales outside Japan.

Nintendo cut its annual sales target for the Wii by 1 million units to 26.5 million units, while raising its forecast for the DS by 1 million to 31.5 million.

Prior to the announcements, shares in Sony closed up 4 percent at 1,909 yen while Nintendo rose 1.6 percent to 32,300 yen. The benchmark Nikkei average rose 1.8 percent.-Reuters