Over a year at EM with underground and Marda alone + stockpikes +other possibilities .But EM not the biggest part of RMS at all .
They are generating cash all the time and have completed mining several pits so far at MM and developed new ones to replace, all the time accumulating cash in the process .
There is no reason to think their cashpile will disappear unless it suits your thinking to do so !
Their announcement this morning supports this with I think 3 mines being developed and cash increasing .
Not to say cash can't fall , but won't fall far .
A bit disingenuous !
