1/Today in @bopinion, I talk about the legacy and career of Jim Simons, the founder of Renaissance Technologies, who is stepping down as the hedge fund's

2/Simons' fund beat the market -- consistently, by huge percentages, after fees.

That's an astonishing accomplishment.

https://t.co/uopG6WutzU
3/How did he do it?

Basically, by being relentlessly smarter and better-managed than the competition.

https://t.co/p6ZTd7POfQ
4/So does Simons' success mean markets are inefficient?

Yes and no.

Obviously yes, since Renaissance could (and can) beat the market. But there are a few key caveats...
5/First of all, RenTech's most eye-popping and consistent returns are in its flagship Medallion Fund.

But most investors can't invest in that fund. It doesn't take your money.

https://t.co/sTXUzl09Lc
6/In fact, the Medallion Fund doesn't even take *its own* money. It makes regular profit distributions, so that the fund's total size remains small -- around $10 billion or so.

https://t.co/bhqE71eSdH
7/This means that the Medallion Fund's famous 39% annualized return (after fees) doesn't compound.

If it did, Medallion would be worth far more than all the rest of the hedge funds in the world combined, by now!
8/So a fund like Medallion isn't really comparable to, say, the return of the S&P. One compounds, the other does not.

Why? Because the market inefficiencies Medallion exploits are limited in size. And thus, Medallion's profit opportunities are limited in size.
9/To address this, Renaissance made a bunch of other funds that do different things than Medallion, and whose strategies scale up more. These have done generally well, but they're no Medallion...

https://t.co/ZsXQ4NNUI8
10/Even as Medallion racked up huge gains in 2020, Renaissance's other funds largely tanked.

This shows that consistently beating the market AT SCALE is incredibly hard, even for the smartest and best-managed people on the planet.

https://t.co/oowJd3k8GH
11/That's no knock against Renaissance, of course. They're the best in the biz.

But it does mean that Renaissance's existence doesn't prove that stock markets are inefficient. Indeed it shows us just how not-so-hugely-inefficient they are!

(end)

https://t.co/uopG6WutzU

More from Noahtogolpe 🐇

Today's @bopinion post is about how poor countries started catching up to rich ones.

It looks like decolonization just took a few decades to start

Basic econ theory says poor countries should grow faster than rich ones.

But for much of the Industrial Revolution, the opposite happened.
https://t.co/JjjVtWzz5c

Why? Probably because the first countries to discover industrial technologies used them to conquer the others!

But then colonial empires went away. And yet still, for the next 30 years or so, poor countries fell further behind rich ones.
https://t.co/hilDvv0IQV

Why??

Possible reasons:
1. Bad institutions (dictators, communism, autarkic trade regimes)
2. Civil wars
3. Lack of education

But then, starting in the 80s (for China) and the 90s (for India and Indonesia), some of the biggest poor countries got their acts together and started to catch up!


Global inequality began to fall.
This thread demonstrates that a lot of academic writing that *looks* like utter nonsense is merely scholars dressing up a useful but mundane point with a ton of unnecessary jargon.


My theory is that the jargon creates an artificial barrier to entry. https://t.co/MqLyyppdHl

If one must spend years marinating one's brain in jargon to be perceived as an expert on a topic, it protects the status and earning power of people who study relatively easy topics.

In econ, a similar thing is accomplished by what recent Nobel prize winner Paul Romer calls "mathiness": https://t.co/DBCRRc8Mir

But mathiness and jargon are not quite the same...

Jargon usually doesn't force you to change the substance of your central point.

Mathiness often does. By forcing you to write your model in a way that's mathematically tractable (easy to work with), mathiness often impoverishes your understanding of how the world really works.

has written about this problem:
When Republicans started to believe in racial bloc voting - when they stopped believing that nonwhite people could ever be persuaded to vote Republican - they started to see immigration as an invasion.

This explains why immigration is now at the center of partisan conflict.


Of course, the belief in ethnic bloc voting becomes a self-fulfilling prophecy.

When a slight Dem tilt among Hispanics and Asians caused the GOP to turn against them, Hispanics and Asians shifted more toward the Dems. Etc. etc. A self-reinforcing cycle.

Bush's 2006 amnesty attempt, and the 2013 intra-GOP fight over immigration reform, were two moments when the GOP could have turned back to the approach of Reagan, and courted Hispanics and Asians.

But they decided against this, and...here we are.

What will disrupt this bad equilibrium, and save American politics from being an eternal race war?

Either:
A) More white voters will grow disgusted with the GOP approach and defect, or
B) The GOP will find some non-immigration-related issues to attract more Hispanics and Asians.

As long as both parties see elections in terms of racial bloc voting - where the only way to win is to increase turnout among your own racial blocs or suppress turnout by the other party's racial blocs - American politics will not improve, and the country will decline.

(end)

More from Government

The Government is making the same mistakes as it did in the first wave. Except with knowledge.

A thread.


The Government's strategy at the beginning of the pandemic was to 'cocoon' the vulnerable (e.g. those in care homes). This was a 'herd immunity' strategy. This interview is from


This strategy failed. It is impossible to 'cocoon' the vulnerable, as Covid is passed from younger people to older, more vulnerable people.

We can see this playing out through heatmaps. e.g. these heatmaps from the second


The Government then decided to change its strategy to 'preventing a second wave that overwhelms the NHS'. This was announced on 8 June in Parliament.

This is not the same as 'preventing a second wave'.

https://t.co/DPWiJbCKRm


The Academy of Medical Scientists published a report on 14 July 'Preparing for a Challenging Winter' commissioned by the Chief Scientific Adviser that set out what needed to be done in order to prevent a catastrophe over the winter
Labour Grandees are listed in Sir Keir Starmer's colleague Jeffrey Epstein's ''Little Black Book''; Blair, Mandelson and Alastair Campbell. COINCIDENTLY, Keir Starmer and some of the same people have connections to ANOTHER of the worlds most prolific peadophiles. #StarmerOut


Starmer failed to bring charges against Jimmy Savile for paedophilia. The decision was made despite the Crown Prosecution Service receiving substantial evidence of his crimes from witnesses and victims several years before Savile died in 2011. #StarmerOut
https://t.co/PNyX5uSAkw


With a past like hers, Margaret Hodge might show a bit more humility.
In the Eighties Hodge was aware of previous child sex abuse in the care homes for which she was responsible, and did nothing about it. #LabourLeaks #StarmerOut

As leader of Islington Council, a post she held from 1982-92, Margaret Hodge was aware of previous, horrendous child sex abuse in the care homes for which she was responsible, and did nothing about it. #LabourLeaks #StarmerOut #CSA

She was guilty of rather more than a casual failure of oversight. In an open letter to the BBC after it investigated a range of monstrous abuse (child prostitution, torture, alleged murders), Hodge libelled one of its victims as “seriously disturbed”. #LabourLeaks #StarmerOut

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The entire discussion around Facebook’s disclosures of what happened in 2016 is very frustrating. No exec stopped any investigations, but there were a lot of heated discussions about what to publish and when.


In the spring and summer of 2016, as reported by the Times, activity we traced to GRU was reported to the FBI. This was the standard model of interaction companies used for nation-state attacks against likely US targeted.

In the Spring of 2017, after a deep dive into the Fake News phenomena, the security team wanted to publish an update that covered what we had learned. At this point, we didn’t have any advertising content or the big IRA cluster, but we did know about the GRU model.

This report when through dozens of edits as different equities were represented. I did not have any meetings with Sheryl on the paper, but I can’t speak to whether she was in the loop with my higher-ups.

In the end, the difficult question of attribution was settled by us pointing to the DNI report instead of saying Russia or GRU directly. In my pre-briefs with members of Congress, I made it clear that we believed this action was GRU.