Historically, financial crises share common macroeconomic characteristics, most notably sharp run-ups in asset prices (like housing or equity) preceding the crisis, and notable massive increases in public debt following the crisis due to bailout costs and declining tax revenues. This is extensively documented in literature such as Reinhart and Rogoff's work on historical financial crises. Current account balances are usually largely negative (deficits), not positive, prior to these crises. Therefore, I and IV are the correct statements representing these similarities.