(Bloomberg) -- Earnings jitters hit shares in Hong Kong after several Chinese tech companies reported worse-than-expected results.

The Hang Seng Index was down 2.4 percent at the midday trading break, with all 50 of its members declining. Technology shares tracked overnight losses for Chinese stocks listed in the U.S. Tencent Holdings Ltd. slid 3.9 percent ahead of next week’s quarterly report, while AAC Technologies Holdings Inc. headed for its worst week since 2009 as brokers downgraded the stock after disappointing results. Sunny Optical Technology Group Co. fell 4.1 percent.

Stocks in Hong Kong resumed their declines after a short squeeze caught bears off guard last week. A rout in technology stocks has punished the Hang Seng Index this year, tipping it into a bear market in September. The gauge has just come off its longest streak of monthly losses in 36 years. Analysts have trimmed their earnings expectations for this year, predicting a contraction for members of the gauge on average.

“Concerns about an earnings slowdown are rising in China markets after AAC Technologies missed estimates,” said Castor Pang, head of research at Core Pacific-Yamaichi in Hong Kong. “There have been a few downgrades on the smartphone makers and earnings worries are spilling over to Tencent. It’s hurting sentiment for the whole market.”

AAC dropped 4.8 percent, headed for a 21 percent tumble for the week as its third-quarter results prompted analyst downgrades. Tencent was poised for its biggest drop in more than two weeks, while Sunny Optical was in line for a five-day loss of 13 percent.

Shares also slipped in mainland China, where the Shanghai Composite Index retreated 1.3 percent and the Shenzhen Composite Index fell 0.4 percent. Financial companies led declines on the CSI 300 Index after the banking regulator set lending targets for private companies.

Among other stocks moving on Friday:

  • Dongfeng Motor and Guangzhou Automobile were among the worst performers on the Hang Seng China gauge after car sales in China declined for a fifth consecutive month
  • Macau casinos extended declines after Melco Resorts’ results missed the lowest analyst estimates and U.S.-listed Wynn Resorts tumbled overnight; Galaxy -3.7%, Sands China -3.8%
  • Banks dragged the Hang Seng Index lower, with Industrial & Commercial Bank of China falling 2.9% and China Construction Bank losing 2.4%; China Merchants Bank and Bank of Shanghai fell at least 4.5% onshore to lead declines on the CSI 300 financials subgauge

To contact the reporters on this story: Sofia Horta e Costa in Hong Kong at shortaecosta@bloomberg.net;Jeanny Yu in Hong Kong at jyu107@bloomberg.net

To contact the editors responsible for this story: Richard Frost at rfrost4@bloomberg.net, Kana Nishizawa, Will Davies

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