Money that arrives year after year
Rather than tying everything up until one distant date, spread it so a bond repays each year. Bankers call this a ladder.
Rungs are spread across the horizon — best net yield in each window, one bond per maturity year, tax-free IFBs competing on equal footing. Where the market has no paper in a window, the next-best yield fills in. Equal split in KES 50k steps at last traded prices. Educational planning — actual auction allocations vary.
Nothing to allocate: either no listed bonds mature within 10 years, or Ksh 3,000,000 split 4 ways falls below the bonds' minimums. Extend the horizon, raise the amount, or use fewer rungs.