Rogier Swierstra
@rogierswierstra.bsky.social
Having fun in math and finance. Lots of opinions, not many posts (EN & NL). Read my work at https://substack.com/@rogierswierstra
Reposted by Rogier Swierstra
Niet alleen Brabantse statenleden, maar ook MOB heeft via een deurwaarder een claim van BVNL (Wybren van Haga) ontvangen. BVNL eist van MOB om alle procedures in de agrosector te stoppen op straffe van een dwangsom van € 50.000/dag
December 13, 2025 at 5:27 AM
Niet alleen Brabantse statenleden, maar ook MOB heeft via een deurwaarder een claim van BVNL (Wybren van Haga) ontvangen. BVNL eist van MOB om alle procedures in de agrosector te stoppen op straffe van een dwangsom van € 50.000/dag
The banter heuristic is that he gets so many get-out-of-jail-free cards that *he* can shoot *Trump* in the middel of 5th Avenue, without consequence
BREAKING: At 7am ET, in response to the emergency overnight filing, Judge Xinis issued a TRO barring the Trump administration from re-detaining Abrego Garcia.
www.courtlistener.com/docket/71191...
www.courtlistener.com/docket/71191...
Memorandum and Order – #114 in Abrego Garcia v. Noem (D. Maryland, 8:25-cv-02780) – CourtListener.com
MEMORANDUM ORDER granting 112 Motion for Temporary Restraining Order; Respondents are enjoined from re-detaining Petitioner in ICE custody until this Court can receive further briefing from the partie...
www.courtlistener.com
December 12, 2025 at 2:10 PM
The banter heuristic is that he gets so many get-out-of-jail-free cards that *he* can shoot *Trump* in the middel of 5th Avenue, without consequence
Reposted by Rogier Swierstra
Zelensky arrived in Kupyansk, which Putin claims is "under Russian control."
December 12, 2025 at 1:03 PM
Zelensky arrived in Kupyansk, which Putin claims is "under Russian control."
Reposted by Rogier Swierstra
I'd be more than usually grateful to those who share this because of the personal importance to me of the event commemorated
macdonnchada.substack.com/p/raul-alfon...
macdonnchada.substack.com/p/raul-alfon...
December 9, 2025 at 2:21 PM
I'd be more than usually grateful to those who share this because of the personal importance to me of the event commemorated
macdonnchada.substack.com/p/raul-alfon...
macdonnchada.substack.com/p/raul-alfon...
Reposted by Rogier Swierstra
Eerste Eurovision Peace Prize naar Benjamin Netanyahu
Eerste Eurovision Peace Prize naar Benjamin Netanyahu
De European Broadcasting Union heeft een speciale vredesprijs in het leven geroepen.
speld.nl
December 8, 2025 at 8:46 AM
Eerste Eurovision Peace Prize naar Benjamin Netanyahu
My response next time someone tells me to keep politics out of sport
December 6, 2025 at 8:56 AM
My response next time someone tells me to keep politics out of sport
Het meest constructieve is als ze alle 5 ministers leveren voor een regering op basis van het formatie-akkoord.
Onze fotograaf Robin Utrecht vangt de status van de kabinetsformatie in 1 beeld:
x.com/robinutrecht...
x.com/robinutrecht...
December 5, 2025 at 12:07 PM
Het meest constructieve is als ze alle 5 ministers leveren voor een regering op basis van het formatie-akkoord.
Reposted by Rogier Swierstra
Onze fotograaf Robin Utrecht vangt de status van de kabinetsformatie in 1 beeld:
x.com/robinutrecht...
x.com/robinutrecht...
December 5, 2025 at 9:51 AM
Onze fotograaf Robin Utrecht vangt de status van de kabinetsformatie in 1 beeld:
x.com/robinutrecht...
x.com/robinutrecht...
Reposted by Rogier Swierstra
Come for the chart showing pension funds have been selling UK equities *again*.
Stay for the interactive dataviz showing the demography of private UK DB schemes
www.ft.com/content/2f2f...
Stay for the interactive dataviz showing the demography of private UK DB schemes
www.ft.com/content/2f2f...
December 5, 2025 at 8:33 AM
Come for the chart showing pension funds have been selling UK equities *again*.
Stay for the interactive dataviz showing the demography of private UK DB schemes
www.ft.com/content/2f2f...
Stay for the interactive dataviz showing the demography of private UK DB schemes
www.ft.com/content/2f2f...
Reposted by Rogier Swierstra
Every night Russian drones kill Ukrainians and they keep flying only because over 5,000 Western and Asian parts power them.
December 4, 2025 at 4:11 PM
Every night Russian drones kill Ukrainians and they keep flying only because over 5,000 Western and Asian parts power them.
Reposted by Rogier Swierstra
Remember that Austrian 0% coupon century bond? Turns out it was *checks notes* a good trade?!? www.ft.com/content/d2d4...
Losing 96 per cent of your money was *checks notes* good?
A pyrrhic defeat
www.ft.com
December 4, 2025 at 7:37 AM
Remember that Austrian 0% coupon century bond? Turns out it was *checks notes* a good trade?!? www.ft.com/content/d2d4...
Very pleased with my submission "No True Strawman" and am sharing it here
(with apologies to true Scotsmen and other fallacy-purists)
(with apologies to true Scotsmen and other fallacy-purists)
Anyway, the world does not need another post dunking on Josh Barro. What it does need, is a word for the fallacy where you make up some weird stereotype about people, and then when it turns out they don't actually act that way, you think that's something strange about *them*.
November 27, 2025 at 2:07 PM
Very pleased with my submission "No True Strawman" and am sharing it here
(with apologies to true Scotsmen and other fallacy-purists)
(with apologies to true Scotsmen and other fallacy-purists)
Reposted by Rogier Swierstra
The audio leak of Steve Witkoff advising the Russian side what to do, what to say and how to progress is nothing more but collaboration with Moscow, probably even more. It further confirms what I was writing on Sunday when the US Senators were actively rejected this.
November 26, 2025 at 7:43 AM
The audio leak of Steve Witkoff advising the Russian side what to do, what to say and how to progress is nothing more but collaboration with Moscow, probably even more. It further confirms what I was writing on Sunday when the US Senators were actively rejected this.
In Buitenhof noemt Sigrid Kaag dit saga "bijna riooljournalistiek" en dat mogen hoofdredacteur Veldhuis (haar stuk van 15-nov hieronder) en ombudsman Staal zich aantrekken.
De kritiek komt van mensen die media begrijpen en democratische normen hooghouden.
De kritiek komt van mensen die media begrijpen en democratische normen hooghouden.
November 23, 2025 at 10:54 PM
In Buitenhof noemt Sigrid Kaag dit saga "bijna riooljournalistiek" en dat mogen hoofdredacteur Veldhuis (haar stuk van 15-nov hieronder) en ombudsman Staal zich aantrekken.
De kritiek komt van mensen die media begrijpen en democratische normen hooghouden.
De kritiek komt van mensen die media begrijpen en democratische normen hooghouden.
Conflicted as a mathematician as to the ideal number of points.
28 is a perfect number, while
24 is the dimension of the Leech lattice
Of course neither matter for peace
28 is a perfect number, while
24 is the dimension of the Leech lattice
Of course neither matter for peace
The Telegraph published a 24-point European counter-plan proposing ceasefire at current lines, NATO-style US security guarantees for Ukraine, return of abducted children and prisoners, Ukrainian control of Zaporizhzhia plant and Kakhovka dam, plus reconstruction funded by frozen Russian assets.
November 23, 2025 at 6:15 PM
Conflicted as a mathematician as to the ideal number of points.
28 is a perfect number, while
24 is the dimension of the Leech lattice
Of course neither matter for peace
28 is a perfect number, while
24 is the dimension of the Leech lattice
Of course neither matter for peace
Reposted by Rogier Swierstra
We made a little video thing to mark Alphaville’s debut on Substack. As you can probably guess after watching this, we’re not going to be pivoting to video any time soon.
November 23, 2025 at 10:02 AM
We made a little video thing to mark Alphaville’s debut on Substack. As you can probably guess after watching this, we’re not going to be pivoting to video any time soon.
Reposted by Rogier Swierstra
November 21, 2025 at 5:54 PM
Reposted by Rogier Swierstra
More on the Total Portfolio Approach, this time from @rogierswierstra.bsky.social open.substack.com/pub/rogiersw...
TPA: the Total Portfolio Approach
Trends in investment management
open.substack.com
November 21, 2025 at 7:57 AM
More on the Total Portfolio Approach, this time from @rogierswierstra.bsky.social open.substack.com/pub/rogiersw...
Reposted by Rogier Swierstra
Opinie: Terugtreden Hans Wijers is onnodig en schadelijk voor de democratie
Opinie: Terugtreden Hans Wijers is onnodig en schadelijk voor de democratie
Uitspraken die Hans Wijers deed als privépersoon zijn irrelevant, dus zijn terugtreden als informateur was onnodig, schrijft Marcel ten Hooven.
www.trouw.nl
November 17, 2025 at 9:03 PM
Opinie: Terugtreden Hans Wijers is onnodig en schadelijk voor de democratie
Interesting issue regarding perpetuals: if you ever stop issuing them (like the city of Haarlem) you still have to service them into perpetuity. Inflation degrades the value until it can't justify the costs of maintaining a centuries-old system
fd.nl/financiele-m...
fd.nl/financiele-m...
Haarlem zoekt houders van eeuwenoude obligaties
De gemeente wil de obligaties, die zijn uitgegeven in de jaren 1769 tot en met 1818, aflossen omdat de kosten van het uitbetalen van de rente niet meer opwegen tegen de baten.
fd.nl
November 10, 2025 at 5:28 PM
Interesting issue regarding perpetuals: if you ever stop issuing them (like the city of Haarlem) you still have to service them into perpetuity. Inflation degrades the value until it can't justify the costs of maintaining a centuries-old system
fd.nl/financiele-m...
fd.nl/financiele-m...
Reposted by Rogier Swierstra
the only instance in recorded history of a traffic collision between a car and a u-boat!
November 9, 2025 at 7:36 AM
the only instance in recorded history of a traffic collision between a car and a u-boat!
Reposted by Rogier Swierstra
Een kabinet kan alléén gevormd worden met democratische partijen die de rechtsstaat respecteren. De VVD doet dat niet. Ik heb tegen de verkenner gezegd dat daar eerst maar eens de schijnwerpers op moeten worden gezet.
Laten we ophouden met doen alsof het normaal is dat de VVD allerlei eisen stelt.
Laten we ophouden met doen alsof het normaal is dat de VVD allerlei eisen stelt.
November 6, 2025 at 3:06 PM
Een kabinet kan alléén gevormd worden met democratische partijen die de rechtsstaat respecteren. De VVD doet dat niet. Ik heb tegen de verkenner gezegd dat daar eerst maar eens de schijnwerpers op moeten worden gezet.
Laten we ophouden met doen alsof het normaal is dat de VVD allerlei eisen stelt.
Laten we ophouden met doen alsof het normaal is dat de VVD allerlei eisen stelt.