Sono Group is trading 5.4% down now at $1.06, and available evidence does not establish a clear catalyst. - Shares fell from $1.12 on September 24 and $1.17 on September 23. - No company-specific announcement dated September 24 or September 25 appears on the press-release page; its latest listed release is from September 14. - Broader markets were modestly higher on September 25.