I am not aware of any mass failure of Credit Unions. My personal opinion is they are more cautious and don’t get into speculative/risky lending. So, I view them favorably compared to banks.

For a specific Credit Union, you should lookup at

http://www.bankrate.com/brm/safesound/brm_explain.asp

for Safe & Sound and CAEL (Capitalization, Asset quality, Earnings and Liquidity) ratings.