STEP-BY-STEP ANSWER:
Step 1: Define each key innovation (adjustable-rate mortgages, securitization, shadow banking).
Step 2: Explain how adjustable-rate mortgages offer flexibility in reaction to changing interest rates, impacting risk management.
Step 3: Describe securitization as a tool for banks to convert loans into marketable securities, thereby increasing liquidity and dispersing risk.
Step 4: Illustrate the role of shadow banking in supplementing traditional banking by providing additional sources of financing and liquidity, albeit with less regulation.
Final Answer: Financial innovations such as adjustable-rate mortgages, securitization, and shadow banking have allowed the banking industry to diversify its products, manage risk more efficiently, and enhance liquidity, ultimately driving increased competition and reshaping both domestic and international banking.