
Former hedge fund manager; writes top 10 finance Substack https://xitter.cf/t.co/UiByE4lqSg and contributor to Bloomberg @opinion.
London, England
Joined September 2011
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Marc Rubinstein retweeted
May I gently suggest, @GreenJennyJones, without doubting your good intentions, that this sort of response is part of the problem.
If you meet a specific wrong with a general virtue, you have not answered the wrong; you have stepped around it.
Replying to @treesey
I abhor cruelty and vindictiveness and hatred. Never mind who from, or who directed against.
Marc Rubinstein retweeted
Revolut’s pivot: Will going full bank kill its tech-level growth and valuation?
I read almost everything I can find about Revolut, but then I saw that Net Interest’s newsletter had dropped a new piece titled Revolut Unbound. I dropped my entire reading queue and started with it.
Net Interest is one of the top finance Substack newsletters, written by @MarcRuby, a former hedge fund manager, seasoned bank analyst, and Bloomberg Opinion contributor.
Marc and I have been following Revolut since almost the beginning, and we both have made small investments in the company. His Revolut Unbound piece is well written; it is best to read the whole thing yourself.
My top takes:
Marc suggests that low per-customer deposit amounts at Revolut could also be due to many customers joining rapidly and initially keeping low balances, which pulls down the overall average.
Another point Marc is making: can Revolut sustain its exceptional growth and high valuation as it fully transitions from a balance-sheet-light fintech company into a real, licensed global bank — or will the constraints of banking limit or alter its upside?
He writes: “One obstacle the group does face as it transitions more fully into a bank is capital. … One big difference though is valuation. … If Revolut can sustain both [rapid growth and 36% ROE], then Storonsky could be very rich.”
That is a great point. Initially, Revolut tried to be balance sheet-light, as I recall, CEO Nik Storonsky said in an interview that this way the company could grow faster and command a higher valuation as a tech company rather than as a bank.
Later, Nik admitted that avoiding heavier regulation was a mistake, and they are now embracing banking licences and biger balance sheets. One day, I will write my opinion piece on why I think it was a mistake.
The core idea of Marc piece: Revolut has come a long way from its early days of wanting to "replace banks" with a light, non-bank model — and securing full banking licences is a unlock that gives it new capabilities (deposits, higher net interest spreads, broader lending), but it also introduces real frictions and trade-offs that didn't exist in its more asset-light fintech phase.
Link to Net Interest newsletter: netinterest.co/?r=26ljc&utm_…
Marc Rubinstein retweeted
Here’s @marcruby’s debut Alphaville post, on the obvious arbitrage between disclosure-free “research” on social media and the massive burdens faced by traditional analysts. Hope it’s the first of many Rubyposts! ft.com/content/04b57c60-08b6…
Marc Rubinstein retweeted
TOMORROW AT 11AM ET🚨🎙️
@MarcRuby and @michaelbatnick dig into the rapid rise of secondaries: why private assets are staying private for longer, how liquidity is being engineered rather than waited for, and what this shift means for valuations, incentives, and risk. They explore who wins, who loses, and whether secondaries are making private markets more efficient — or just more complex.👇🔥
Click me🎦youtube.com/live/N6P4tgIJhlo
Marc Rubinstein retweeted
There’s a long way to go before wagers on events can rival markets that allocate capital, writes @MarcRuby (via @opinion) bloomberg.com/opinion/articl…
Marc Rubinstein retweeted

Marc Rubinstein@MarcRuby25 Nov 2025
United Kingdom
United KingdomConnected via United Kingdom App StoreAccount-level information, not a live location or per-post device.
Founder of alternative asset firm Blue Owl reckons fears of ruptures in private credit are "like the Mandela effect of finance... just common population collective misimpression of what's going on." To explore the issue further, I'm hosting a webinar with Sayonton Roy of Citigroup.
Marc Rubinstein retweeted
Almost five years after the GameStop frenzy, retail traders are making their presence felt more widely in US markets, writes @MarcRuby (via @opinion) bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
US consumers have rarely been gloomier but lenders’ restraint on growth and risk are keeping losses at bay, writes @MarcRuby bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
Fifth Third's purchase of Comerica serves as a template for frustrated shareholders everywhere, writes @MarcRuby (via @opinion) bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
Open banking comes at a price that benefits the biggest the most, writes @MarcRuby bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
The humans who decide the makeup of the S&P 500 suggest a template for a world driven by algorithms, writes @MarcRuby bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
Highly recommend the latest Net Interest Extra w/ Davide Serra x @MarcRuby. They take a look at investing in financials, European macro & lessons learned
Once there were 11 financials-focused specialist funds — now just 1 remains, led by Davide. Really engaging conversation
Marc Rubinstein retweeted
Substack is a facing a challenge that has humbled many media companies before it, writes @MarcRuby (via @opinion) bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
PS the number of unsophisticated financial “investors” commenting on this thread is both sad and funny.
It’s called leverage folks!
Get an ISDA, be banked by a prime, put the trade on $5-10B a side. This is how it’s done.
Marc Rubinstein retweeted
FICO's days of 100%+ price increases are probably over - in the battle between monopoly profits and regulatory pressure, the regulators usually win, writes @MarcRuby bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
Interesting to note that OpenAI CEO Sam Altman [@sama] will join Fed Vice Chair for Supervision Michelle Bowman for a fireside chat at the Fed’s July conference on bank capital and regulatory reforms:
federalreserve.gov/conferenc…
Marc Rubinstein retweeted
Those miles you're racking up are probably more important to your airline than to you, writes @MarcRuby bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
The London Stock Exchange confronts the same US-sized temptation as Wise – but changing location isn't so simple when you're the venue - writes @MarcRuby bloomberg.com/opinion/articl…
Marc Rubinstein retweeted
Standards are falling. @FT used to be a quality newspaper. Now it’s just priced like one. Ironically any AI checker could pick up spelling errors.















