... ticker (XEM-USD), actually stands for "New Economy Movement." NEM is a custom blockchain and not a fork of Bitcoin or any other cryptocurrency.
source https://www.google.com/url?rct=j&sa=t&url=https://seekingalpha.com/article/4214933-cryptoassets-explained-nem&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNE_m0yHwxWPhNgicWxKiq_cq4JMiQ
