Amazon.com's (AMZN) secret to its soaring cash-flow growth? Steadily lengthening the time it...

|By:, SA News Editor

Amazon.com's (AMZN) secret to its soaring cash-flow growth? Steadily lengthening the time it takes to pay suppliers - now 64.6 days, up from 59 days last year and 49 in 2003. Amazon's working capital management is to be envied, but investors shouldn't get too used to it: You can't keep extending payment terms with your vendors forever.