DocuSign Inc (DOCU), the eSignature software company, is a free cash flow (FCF) juggernaut. It has almost no capex requirements and produces nearly one-third of sales as FCF. That happened this past quarter with its June 6 release of quarterly earnings for its fiscal quarter ending April 30, 2024. So, why is DOCU stock so far off its highs? It’s trading for $51.35 per share in midday trading on Tuesday, June 11, down from $60.83 on May 15. After all, it’s very cheap, trading at an FCF yield of 8.66%. This can be seen by dividing its trailing 12-month (TTM) FCF of $904.6 million by its market v…