Japan's Nikkei falls to three-week low as investors dump AI stocks, SoftBank slides

Fujikura

20/05/2026 03:19

By Junko Fujita

TOKYO, May 20 (Reuters) - Japan's Nikkei share average slipped to a near three-week low on Wednesday, with SoftBank Group among the top laggards, as investors locked in profits on AI-related stocks that had powered the market's recent rally.

The Nikkei .N225 was down 1.6% at 59,558.06, as of 0135 GMT, touching its weakest point since May 1. The broader Topix .TOPX declined 1.7% to 3,784.67.

Market participants sold shares that had driven the Nikkei to record highs earlier this month, according to Kazuaki Shimada, chief strategist at IwaiCosmo Securities.

"But this is an appropriate adjustment of Nikkei's reliance on a small group of shares."

The Nikkei had reached an all-time high of 63,799.32 on May 14.

Among the biggest decliners, technology investor SoftBank Group 9984.T tanked 6% on Wednesday and chip-making equipment maker Tokyo Electron 8035.T lost 3.75%.

Fibre optic cable maker Fujikura 5803.T fell 7.7%, extending losses for a fifth consecutive session after reporting fiscal 2028 operating profit below market expectations.

Fujikura, a supplier of materials used in AI data centres, had been one of the standout performers in the Nikkei's recent rally.

"When Fujikura is sold, investors sell other technology stocks," Shimada explained.

However, he added that declines in the sector remained limited ahead of AI chipmaker Nvidia's NVDA.O quarterly earnings due later in the day.

"If Nvidia's results are good, the shares may jump in the next session," he said.

Shares of Advantest 6857.T, a supplier for Nvidia, bucked the trend and gained 0.83%.

Meanwhile, Ube Corp 4208.T surged 20% to become the Nikkei's top percentage gainer after the cement maker announced plans to increase dividend payouts.

Of the more than 1,600 stocks traded on the Tokyo Stock Exchange's prime market, 83% fell, 14% advanced and 1% traded flat.

 (Reporting by Junko Fujita; Editing by Sherry Jacob-Phillips)

 ((junko.fujita@thomsonreuters.com;))