How to build your 'Oh, crap!' fund

FILE - This April 2017 file photo provided by NerdWallet shows Liz Weston, a columnist for personal finance website NerdWallet.com. (NerdWallet via AP, File)

How to build your 'Oh, crap!' fund

FILE - This April 2017 file photo provided by NerdWallet shows Liz Weston, a columnist for personal finance website NerdWallet.com. (NerdWallet via AP, File)