Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why buy bonds in a no-arbitrage market?
There is no single 'market interest rate'; there are myriad interest rates that vary by risk profile & term. Corporate bonds are (typically) riskier than bank deposits, and therefore pay a higher effective rate when the market for that bond is in equilibrium than a bank account does. If you are willing to accept a higher risk in order gain a higher return, you might choose bonds over bank deposits. If you want an even higher return and can accept even higher risk, you might turn to stocks over bonds. If you want still higher return and can bear the still higher risk, derivatives may be more appealing than stocks.