Electro Optic Systems Holdings Ltd. shares extended their slump following the company's response to a short-seller report from Grizzly Research. The Australian defense firm's stock price continued declining as investors digested the company's rebuttal to the negative assessment of its business practices and financial health.

Short seller reports frequently trigger market volatility, particularly in defense sector stocks where valuation can be complex. Grizzly Research's allegations, though unspecified in the source, prompted EOS to defend its operations, suggesting concerns about transparency or accounting practices that may have unsettled investors.

The extended share price decline reflects investor uncertainty about Electro Optic Systems' future prospects. The defense company now faces pressure to restore market confidence as its market capitalization suffers from continued selling pressure following the controversial report and subsequent response.