BUZZ-Cerebras shares fall after Culper discloses short position

October 28 - ** Chipmaker Cerebras Systems (ticker: CBRS.O) shares fell 4.7% to $113.67 after Culper Research disclosed a short position

** Culper said it believes the company's flagship Wafer Scale Engine chip, which covers an entire silicon wafer, has a usable lifespan of "only 1.2 to 2.5 years"

** The firm claimed CBRS has never solved the issue of thermal expansion, and accused it of continuous virtual operations leading the wafer to overheat, "so the wafer in fact never truly cools down"

** "This temporary makeshift solution just swaps one fatal flaw for another: the wafer can never cool and is rapidly damaged during actual use" — Culper

** Reuters was unable to independently verify the claims in the report

** CBRS did not immediately respond to Reuters' request for comment

** As of the close of the previous trading day, the stock had fallen 61.6% since its Nasdaq listing in May

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