Vanguard Group has issued emails to its clients urging them to remain calm and adhere to their financial plans amid a sharp market downturn. The message emphasizes the importance of not withdrawing investments during periods of volatility. The recent market decline has been significant, with Japan's Nikkei 225 closing at 31,136.58, marking a 2,644-point drop, the third-largest in its history. Some experts suggest that such downturns present buying opportunities for long-term investors. International media, including Nikkei and Stern, have echoed similar sentiments, advising investors to remain composed and consider long-term strategies. Analysts highlight that market corrections, while challenging, can offer opportunities for portfolio rebalancing and strategic investments.