Final answer:
If Bank ABC has a target reserve ratio of 10% and no excess reserves, when it receives a new deposit of $500,000, it will initially expand its loan by $450,000.
Step-by-step explanation:
The initial loan expansion of a bank depends on its reserve ratio and excess reserves. In this case, Bank ABC has a target reserve ratio of 10% and no excess reserves. When it receives a new deposit of $500,000, it will expand its loans by the amount that is not reserved. Since the target reserve ratio is 10%, the bank will reserve 10% of $500,000, which is $50,000. Therefore, the bank will initially expand its loans by $450,000 ($500,000 - $50,000).