On September 10, IBM fell 3.07% in regular trading, trading at $232.58 per share, with turnover of $6.68 billion. The sharp decline was driven by the company's disclosure of preliminary second-quarter results that came in significantly below market expectations.

According to market reports, IBM's Z series product line was the core drag, with performance falling far short of Wall Street consensus estimates. The earnings shortfall triggered a massive single-day market capitalization loss of approximately $68 billion, potentially marking the stock's worst single-session performance since October 1987 by intraday drawdown. Adding to investor concerns, regulatory authorities have formally intervened, launching a comprehensive investigation into the circumstances surrounding the earnings miss. Market analysts broadly noted that restoring investor confidence represents a significant challenge for IBM going forward.

The setback comes just days after IBM had gained over 3% on optimism around its Red Hat subsidiary securing AI and security partnership orders, with Susquehanna also raising its price target from $225 to $235. The abrupt reversal underscores the severity of the Q2 earnings disappointment and the outsized impact of the Z series shortfall on overall sentiment.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)