Rossouw van Jaarsveld | Overfit and Chill
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The Price of Not Knowing

The finale. Three posts established that South African deposits are permanent, inert and behaviourally identical across banks, whi...

2026/09/10
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Shorter Than You Booked

Post 3/4 of the No Gut Feelings Bank series. A rolling swap ladder is a filter, so I estimated the South African rate spectrum and...

2026/08/10
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Banking on Deposits That Can Leave

Post 2/4 of the No Gut Feelings Bank series. How much maturity transformation does an SA deposit base license, and is the behaviou...

2026/07/18
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What Is a Deposit Actually Worth When Rates Move?

Post 1/4 of the No Gut Feelings Bank series. I build a behavioural model of non-maturing deposits - current accounts, notice, fixe...

2026/06/19
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Do Macro Variables Help Forecast the Yield Curve? Three Honest Experiments

A follow-up to the yield-curve forecasting post. I add inflation, the repo rate, the rand and the VIX to the forecasts in three wa...

2026/06/14
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Alm4 Banking2 Deposits1 Etf2 Finance2 Fixed income2 Hedging1 Irrbb3 Liquidity1 Machine learning3 Ngfb2 Optimisation1 Optimisation alm1 Portfolio optimization1 Quant finance1 Signal processing1 Yield curve2

Recent Posts

The Price of Not Knowing

2026/09/10

Shorter Than You Booked

2026/08/10

Banking on Deposits That Can Leave

2026/07/18

What Is a Deposit Actually Worth When Rates Move?

2026/06/19

Do Macro Variables Help Forecast the Yield Curve? Three Honest Experiments

2026/06/14

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