Q. LIBOR-OIS Spread (LOIS)

This spread is used as a health measure on banks.  The following description is from a St. Louis Fed article. 

"The term Libor-OIS spread is assumed to be a measure of the health of banks because it reflects what banks believe is the risk of default associated with lending to other banks" 

For the the 3-month LIBOR and the overnight index swap (OIS) rate use LOIS <go> on Bloomberg.