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Portfolio construction is clearly a passion point for Nico Katzke of Satrix. He's also a fan of analogies, so you can expect to learn about whether it's the elephant or the mouse that swings the bridge that they are crossing. But beneath the fun, there's a serious learning opportunity here about how asset allocation drives the returns in a multi-asset balanced fund. Identifying the elephant is a very important part of the process.

When GPS first became available, the publicly available version was deliberately handicapped. It's an approach that didn't last. With debate around free AI models getting worse all the time, it's a good opportunity for Dominique Olivier to sniff out a parallel situation in the history books.

Selected highlights from the week, as covered in the daily Ghost Mail newsletter.

In this deep dive, I contrast BHP and DRDGOLD as mining houses at the opposite end of the size and capex spectrum. Where BHP has diversified into copper, DRDGOLD has stuck to its knitting. But will that continue?

With the August / September earnings season behind us, it's helpful to look at share price moves over the past 30 days on the JSE to see how sentiment has shifted. The PGMs have driven the Top40 higher, while insurance has taken a breather.

At the halfway mark in 2025, we've lived through some huge geopolitical shifts. The world's gaze has shifted beyond just the US market. Many investors choose to stick with what they know in times like these. This means homegrown favourites on the JSE. But which stocks have been the big winners thus far this year, and what do they have in common?