After Oracle declared its plan to issue bonds worth $18 billion, its pre-market stock price experienced a decline of over 1%. In the financial world, when a company announces such a large-scale bond issuance, it often triggers concerns among investors. Issuing bonds means the company is taking on more debt, and investors may worry about the company's ability to manage this debt and its overall financial health. This kind of market reaction is quite common as investors reassess the risk - reward profile of holding the company's stock.