It'd be to easy for the cynic in me to say “plus ca change, plus ce la meme chose”. Or new CEO, same old NSE bs. In any case, I've confidentially been informed that the ATS has a trigger mechanism that refuses any share orders that lead to the NSE falling below 3,100 (joke).
As an investor, you need to be aware of this important buying point. Yes there was a power cut, but this is a Ksh0.8trn business so there is no excuse. It should have a business continuity plan that among other contingencies, takes into account what happens when there is a black-out, terrorist attack, floods etc. It may never happen, but it can happen and if value your business you need to plan for those once-yr/decade events.
The other broader issue, is that it seems that ATS never underwent a robust user testing. Because its a processing system, you'd expect it to have been tested for huge volumes (such as Safaricom which led to a break), low volumes, certain NSE levels, certain price inputs (this would void the almost monthly price "funnies").
Unusually, the hitch didn't result in a hike in the NSE so maybe the previous coding that breaks the ATS at NSE levels below 3,100 has now been fixed.
PS: Like I said here, the NSE is very straight forward business. Its a a bit like our tourism, be supportive of it and peeps see the potential and attractions. Mess it around and all over sudden it becomes a curiosity rather than Kenyans' calling point for their investments and savings.