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QuantLandi Digest

Alexandre Landi

Where financial theory meets implementation

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Substack
PricingOnly free issuesPublishesTwice weekly
Issues52Founded2 years agoLast Issue19 days ago
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Latest Issues

Bloomberg in Excel vs Bloomberg in Python

Excel is still the fastest way to look at Bloomberg data.

It is a terrible factory for the same 20-column panel every month-end.

Thanks for reading QuantLandi Digest! Subscribe for free to receive new posts and support my work.

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19 days ago
4

Where Log Returns Come From

Many courses define the log return as ln(S_t/S_0) and move on. But where does that formula actually come from?

It is not an arbitrary transform. Take the continuous-compounding formula Pe^(rT) = FV and solve it for r. Set T = 1 on a price...

a month ago
1

From Discrete to Continuous Compounding

You have $1,000 today. Under continuous compounding, how much will you have in 1, 2, or t years? The compact answer is Pe^(rT). But where does e come from? And what does “continuous compounding” actually mean?

In this slide deck, I build t...

a month ago
1

Arithmetic vs. Logarithmic Returns

+10% in year 1, then −10% in year 2. Some people say the two-year return is 0%. Obviously (?), it isn’t.

Arithmetic returns compound by multiplying growth factors, not by adding period returns. Logarithmic returns do add over time - but re...

a month ago
1

Foundational Maths You Need Before Studying Quant Finance

Weak foundations make it very hard to follow asset pricing, derivatives, risk management, and portfolio theory once classes begin.

I put together a self-contained summer prep deck for students joining our MSc in Financial Markets and I...

2 months ago
2

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