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calculator on this site exists to explain how financial instruments work. Nothing here is
investment, tax or legal advice, a recommendation, or a valuation you can rely on.
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StrikeAndYield crib sheet · information and education only
Money Markets
Short-term funding instruments — where banks, corporates and governments borrow for days to a year.
The shelf — 10 instruments
Plain English 5
| Building Society Savings Contract | Save at a below-market rate now to earn the right to borrow at a below-market rate later. A forward-starting mortgage option, sold as a savings account. |
| Certificate of Deposit | A deposit with a term and a rate — the same instrument at the savings branch and on a bank funding desk. |
| Money Market Fund | The mutual fund that pretends to be a bank account — cash parked in the market's overnight instruments. |
| Savings Deposit | The product almost everyone owns and almost nobody analyses: a loan you make to a bank, repayable on demand, at a rate the bank chooses. |
| Treasury Bill | Government debt measured in weeks: the closest thing in finance to cash that pays interest. |
Needs one idea 4
| Commercial Paper | Corporate IOUs measured in days — how blue-chip companies borrow between bond issues and bank lines. |
| Repo | Sell a bond today, buy it back tomorrow: the secured loan that finances the entire bond market. |
| Securities Lending | Renting out shares you already own. The invisible plumbing that makes short selling, market making and settlement work — and quietly earns fund holders a few basis points. |
| Structured Deposit | A deposit whose interest depends on a market. Capital protected by the bank, upside capped by the option budget — and the budget is smaller than the brochure suggests. |
Market knowledge 1
| Trade Finance | A bank stands between two strangers on opposite sides of the world so that neither has to trust the other. The oldest financial product still in daily use. |
What moves prices here
- Where reserves are, and how scarce — Scarcity pushes the rate up through the corridor
- Collateral availability — Scarce collateral makes secured borrowing cheaper, not dearer
- Haircuts — They set the maximum leverage of the whole system
- Credit appetite between banks — The unsecured-to-secured spread is the stress gauge
- Regulatory dates — Balance-sheet reporting distorts prices predictably
- Money-fund rules — What funds may hold is a legal fact, not a preference
The calendar
| Weekly | Bill auctions |
| Daily | The overnight rate publication |
| Six to eight times a year | Policy meetings |
| Month and quarter end | Balance-sheet reporting |
| Year end | The largest of those distortions |
Which risk decides, across the shelf
| Failure mode |
Decides | Share |
| Market | 2 of 10 | 20% |
| Credit | 5 of 10 | 50% |
| Liquidity | 2 of 10 | 20% |
| Funding | 1 of 10 | 10% |
| Operational | 3 of 10 | 30% |
Counted from the same table each product page prints. Not a
rating and not a ranking: there is deliberately no total.