In a bombshell announcement last week Chevron said it is writing down (reducing the paper value) of all its shale assets by $10-$11 billion in the fourth quarter. “More than half” of the write-down is for its Marcellus/Utica assets (see Chevron Writes Down $5B+ in Marc/Utica Assets, Looks to Sell All). In addition, the company has put all of it’s M-U assets on the market for sale (see Chevron Confirms M-U Assets for Sale, Asks Vendors to Avoid Media). What does a write-down of asset value actually mean? Is it important?