Asian stocks fell again on Friday, with Seoul leading losses, as tech sector concerns and Wall Street weakness extended a volatile week of trading.

Seoul tanked again on Friday, leading another rout across Asian equity markets as the rollercoaster ride that has characterised the week rattled into the weekend.

The Kospi has seen wild swings over the past five days amid growing concern about a possible bubble in the tech sector that some warn could soon burst.

The sell-off followed heavy losses on Wall Street, where Apple led Magnificent Seven titans lower after announcing price hikes for laptops, tablets and other products, citing rising costs.

The news caused a reversal on the Nasdaq and S&P 500, which had been boosted early on by blowout results from chip company Micron.