中文：

评级展望负面意味着某个机构或公司的未来信用评级可能被下调。这通常意味着该机构或公司的经营状况、财务状况或行业前景存在较大的不确定性或风险，因此评级机构认为其未来评级被下调的可能性较大。

评级展望负面的原因可能是多方面的。例如，公司的业务模式可能存在较大的问题，或者公司的财务状况可能恶化，或者公司所在行业的竞争环境可能变得更加激烈。这些因素都可能导致公司的未来业绩不佳，进而导致其信用评级被下调。

对于投资者来说，评级展望负面是一个重要的信号。如果一个公司的信用评级展望负面，那么投资者应该更加谨慎地考虑该公司的投资价值。因为这可能意味着该公司的未来业绩存在较大的不确定性或风险，投资者需要仔细评估这些风险并做出明智的投资决策。

英文：

A negative rating outlook means that the future credit rating of an institution or company may be downgraded. This usually means that there are significant uncertainties or risks in the operating status, financial condition, or industry prospects of the institution or company, so the rating agency believes that there is a high probability of a future rating downgrade.

The reasons for a negative rating outlook can be multiple. For example, the company's business model may have significant problems, or the company's financial condition may deteriorate, or the competition in the industry in which the company operates may become more intense. These factors can all lead to poor future performance of the company and subsequently result in a downgrade of its credit rating.

For investors, a negative rating outlook is an important signal. If a company's credit rating outlook is negative, then investors should be more cautious in considering the investment value of the company. Because this may mean that there are significant uncertainties or risks in the company's future performance, investors need to carefully evaluate these risks and make informed investment decisions.