One stock is more than a third of the market
Safaricom's KES 1.54 trillion capitalisation is about 37% of the exchange's KES 4.17 trillion. The next five names — Equity, KCB, EABL, Co-op and Absa — add roughly KES 1.35 trillion between them. Six securities out of seventy-one carry roughly two-thirds of the market's value.
That concentration is the single most important fact about the NSE as an index. The all-share index is not a read on seventy-one Kenyan companies; it is mostly a read on one telco and five banks, and it moves when they move.