(Reuters) - Shares in Apple Inc AAPL.O and its suppliers fell on Thursday after a raft of analysts read a prediction of softer smartphone sales from Taiwan Semiconductor Manufacturing Co Ltd 2330.TW as driven chiefly by concern about demand for iPhones.

FILE PHOTO: A logo of Taiwan Semiconductor Manufacturing Co (TSMC) is seen at its headquarters in Hsinchu, Taiwan October 5, 2017. REUTERS/Eason Lam/File Photo

TSMC, the world’s largest contract chipmaker and a major Apple supplier, revised its full-year revenue target to the low end of its earlier forecast.

“Apple represents nearly 20 percent of TSMC’s revenue so the outlook potentially points to weaker-than-anticipated iPhone demand,” Atlantic Equities analyst James Cordwell told Reuters.

Others, some asking not to be quoted, said baldly that the warning was “exactly” about Apple.

Mizuho Securities USA said in a client note that its checks continue to point to soft demand for iPhone X, the Cupertino-based firm’s tenth anniversary phone released last November, in addition to a steady fall in iPhone 8 and 8 Plus orders.

Apple’s shares were last down 2.5 percent and were the biggest drag on the tech-heavy Nasdaq index.

Shares of Apple suppliers including Qualcomm Inc QCOM.O, Intel Corp INTC.O, Qorvo Inc QRVO.O, Skyworks Solutions Inc SWKS.O and Broadcom Inc AVGO.O fell by 2 percent to 5 percent.

“Until the new iPhones in the Fall start driving the production food chain in Q3, mobile’s going to be weak,” Elazar Advisors analyst Chaim Siegel said.

TSMC, also a supplier to Qualcomm and Nvidia Corp NVDA.O, said it expects growth this year of 5 percent for the global semiconductor industry, weaker than an earlier forecast of 5-7 percent.

Data provider TrendForce had earlier estimated 2018 global smartphone production at around 1.5 billion units, 2.8 percent up on 2017 but down from a previously expected 5 percent.

TSMC on Thursday estimated 8 percent growth for contract chipmakers, compared with its previous forecast of 9-10 percent.

U.S.-listed shares of TSMC TSM.N were down 6 percent, while other chip equipment makers such as Applied Materials Inc AMAT.O and Lam Research Corp LRCX.O fell about 5 percent and ASML Holding NV ASML.O lost 3.6 percent.

Another big industry bellwether, chip equipment maker Lam Research, said on Wednesday its shipments missed consensus estimates for the first time in five years.

Chipmakers Analog Devices Inc ADI.O, Micron Technology MU.O and Xilinx Inc XLNX.O were also down by 3 percent to 4 percent.