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Interest rates play a critical role in financial decisions. They act as the cost of borrowing money or the reward for saving money. In the context of our exercise, the certificate of deposit at the bank offers an interest rate of 2%, which is relatively low compared to the 6% interest rate charged by the bank for car loans.
This interest rate difference reflects the risk and duties undertaken by the bank. The bank profits by lending out money at higher rates than it pays to savers, but they also assume the risk of not getting it back. When a borrower defaults, the bank is shielded by funds and legal methods to minimize losses and protect depositors. Thus, interest rates offered play a crucial role in measuring the risk and potential gain from investments or loans.
When lending directly, even at a higher interest rate, one must consider the increased risk of losing your investment compared to the safer bank offering.

• An interest rate is essentially the cost of money expressed as a percentage.
• Higher interest rates typically imply higher risk of default.
• Banks offer interest rates based on the market conditions and risk assessments.

Default risk is the possibility that a borrower will not repay a loan as agreed. When dealing with banks, the risk is minimized through screening processes and risk assessments. However, when deciding to personally lend money, one faces significantly higher default risks.
In the exercise, even if the borrower offers a higher interest rate than the bank, there's no guarantee they will not default. Banks limit the risk by diversifying their loans and having security measures. Direct lenders do not have these safety nets, which significantly raises the likelihood of loss.
Considering this risk is vital for anyone contemplating personal lending. The potential for default must always be carefully weighed against the promised return.

• Default risk is the chance of non-repayment.
• Banks carry out thorough screening to lower this risk.
• Personal lending exposes one to a higher likelihood of default.

Liquidity refers to how easily an asset can be converted into cash without significantly affecting its value. In the context of the exercise, a certificate of deposit offers a level of liquidity, albeit with some penalties for early withdrawal.
This liquidity is something one forfeits when loaning directly to someone for a car. Direct loans are not easily convertible back to cash, and one may have to wait for the borrower to pay back according to the agreed schedule, or possibly even longer if issues arise.
Hence, potential lenders must consider how quickly they may need their money back—a key reason why many choose the safer option of traditional banking.

• Liquidity measures how quickly assets can be converted to cash.
• Bank deposits typically offer easier liquidity compared to personal loans.
• Lack of liquidity in personal loans can be risky if funds are needed suddenly.