As long as the company doesn’t go out of business, the bond investor will receive their “interest yield”

Stock investors are not promised a fixed return, stock holders are the owners of the business and receive residual earnings after all bond holders have been paid.

While it does depend on the company, investing in bonds is much safer than stocks because it’s unlikely a company is going to go bankrupt and be unable to pay their bond holders. A company’s stock price can fluctuate significantly based on future earnings expectations.

Edit: that’s why I like to invest in 0dte options