English to French Bus/Financial Finance (general)

Hi there,

Can anyone help with a better translation for the aforesaid expression ("kitchen-sinking exercise")?

Specific sentence is: "Banks are reluctant to do a real kitchen-sinking exercise and a limited proportion of the underlying losses have been reported"

Document deals with: market review (equity and credit markets) in the context of the subprime crisis, subsequent financial turmoil and the assets write-downs and losses recently reported by financial institutions around the world.

I got the idea but can't find a more synthetic solution.
French version proposed is: " Les banques ne semblent pas vraiment vouloir publier tous leurs mauvais résultats d’un coup pour faire croire à un scénario renouant obligatoirement avec des hausses à l'avenir ; seule une partie des pertes sous-jacentes a été publiée. "


Thanks a lot/Merci d'avance !