What credit is — Credit Module 1 | LeadAfrik Public Economics Hub

Credit is the most under-discussed force in finance. It's larger than equity markets, older than banks, and the single mechanism by which trust gets converted into productivity. Without credit, businesses can't bridge cash-flow gaps, households can't buy houses they couldn't afford in one cheque, and sovereigns can't smooth tax receipts across years. Modern economies run on credit.

The structure of every credit transaction

Every credit transaction has the same shape: someone with money today (the lender) gives it to someone who needs it today (the borrower) in exchange for a promise to repay more in the future. The 'more' is interest — the price of patience. The 'someday' is the term. The 'promise' is what makes it credit; if it were a gift, there'd be no claim.

text

  LENDER  ─── cash today ──────────►  BORROWER
     ◄── promise: principal + interest ───
                  at agreed dates

Three things are traded:
  1. Time (today's money vs future money)
  2. Risk (the borrower may not repay)
  3. Opportunity (the lender forgoes other uses of the cash)

The structure that underlies a credit card, a mortgage, a corporate bond, and a sovereign Eurobond — identical.

Why interest rates are what they are

Every interest rate, from a 30-day T-bill to a 30-year mortgage, decomposes into the same components:

Risk-free rate: what you'd earn on a riskless investment of the same tenor. Approximated by sovereign treasuries in your currency.
Credit spread: extra yield demanded for the specific borrower's default risk vs the risk-free benchmark. Junk bonds have wide spreads; AAA-rated corporates have narrow ones.
Inflation expectation: investors demand compensation for the purchasing-power loss they expect over the loan's term.
Liquidity premium: how easily the lender can exit the position before maturity. Tradeable bonds have lower premiums than private loans.
Term premium: extra compensation for committing money for longer. Usually positive (the yield curve slopes up) but inverts during stress.

The 5-component decomposition is the analyst's first instinct

When a Kenyan corporate borrows at 15% while T-bills yield 11%, the 4-point spread is the market's pricing of: (a) the corporate's default risk above sovereign; (b) liquidity premium for a private loan vs tradeable T-bill; (c) any term-mismatch premium. Senior analysts decompose every interest rate this way reflexively. It's the first muscle to build in credit.

Credit is older than banks

The first credit records are 4,000-year-old Mesopotamian clay tablets — barley loans at fixed interest, denominated in shekels, repayable at harvest. The Code of Hammurabi (1750 BCE) set interest-rate caps: 20% for silver, 33% for barley. Knights Templar provided cross-border credit in the 12th century. Italian merchants invented double-entry to track credit obligations in the 15th. Modern banks formalised credit at scale in the 17th and 18th. The forms keep changing; the underlying transaction does not.

Exercise

A SACCO offers a 1-year unsecured personal loan at 18% APR. A Kenyan corporate Eurobond yields 9.5% in USD. A US Treasury 1-year bill yields 4.7%. Decompose all three rates into the 5 components. Which component drives most of the difference between the SACCO loan and the T-bill? Between the corporate Eurobond and the T-bill?