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Implementing QuantLib

The blog and books by Luigi Ballabio, one of the administrators and lead developers of the QuantLib project.

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Latest posts

Latest updates to "A QuantLib Guide"

This is just a quick post to list a few updates in A QuantLib Guide .

The software side of replication

Today’s post was originally published in the November 2025 issue of Wilmott Magazine . What if you could make it a lot easier for readers to replicate your paper?

QuantLib and A.I.

I don’t use A.I. for my posts; I prefer the human touch (and if you suspected I did use it because of em-dashes, I can point you to a snapshot of my blog from 2015 where you can see that I averaged a couple of them per post). But this doesn’t mean I’m opposed to using A.I. for coding.

Spread calculations

Here is another addition to A QuantLib Guide : a notebook on various spread calculations.

Some more improvements to "A QuantLib Guide"

Just a quick post to belatedly wish you a happy 2026 and to list a number of improvements in A QuantLib Guide .

Inflation bonds

Here is the latest addition to A QuantLib Guide : a notebook on inflation bonds.

Bonds and CDS curves

Following the notebook I posted a couple of months ago on default probability curves , here is another short one in which they are used for pricing bonds.

"Implementing QuantLib" as a paperback: five years later

Recently I realized that it’s already five years since I published my Implementing QuantLib book as a paperback on Amazon , effectively freezing it. Is it still up to date?

Default-probability curves

Here is the latest addition to A QuantLib Guide : a notebook on bootstrapping and using default-probability curves.

Cash-flow analysis

This time, I have a proper look at a bit of infrastructure that I’ve used in multiple notebooks before.