When CBK raised the CBR to 16.5 this was precisely what they wanted:banks hiking their rates to deter borrowing hence control liquidity in the market.
Equity has just done what the regulator wants,furthermore if you look at the spread when the CBR was at 5.65(I cant remember the exact rate but it was around 5%)equity was charging 15% thats a 9+% spread now its around 8.5% in away the bank has reduced its spread by 0.5%.
'......to the acknowledgment of the mystery of God, and of the Father, and of Christ; 3 In whom are hid all the treasures of wisdom and knowledge.' Colossians 2:2-3