SoftBank Group is trading at ¥6,035.00, down -3.27%, with reports linking its September 29 decline to a sharp fall in subsidiary Arm’s U.S.-listed shares the previous day. - Arm fell amid a semiconductor selloff and profit-taking after a strong run. - Broader Japanese shares also weakened, as caution around high bond yields and rising oil prices added pressure. - No separate SoftBank-specific announcement explaining the move was identified.