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Greenspan Tells Congress Bad Data Hurt Wall Street
CWmike writes "Former Reserve Bank chairman Alan Greenspan has long praised technology as a tool to limit risks in financial markets. In 2005, he said better risk scoring by high-performance computing made it possible for lenders to extend credit to subprime borrowers. But today Greenspan told Congress that the data fed into financial systems was often a case of garbage in, garbage out. Christopher Cox, chairman of the Securities and Exchange Commission, told the committee that bad code led the credit rating agencies to give AAA ratings to mortgage-backed securities that didn't deserve them. Explaining in his testimony what failed, Cox noted a 2004 decision to rely on the computer models for assessing risks — a decision that essentially outsourced regulatory duties to Wall Street firms themselves."
I keep on harping about this. Who assures data quality? With web 2.0, cloud computing, distributed applications etc. who assures that those actual data are correct?
The article addresses that there were only 20 years of data, but doesn't address this fundamental issue. In the past 20 years we have had wars, terrorist attacks and recessions. Plenty of jolts. Once a data stream becomes polluted, in my experience, determining what is valid and what isn't is *hard*.
Though all-in-all I think Greenspan is in the hot seat and just looking for a scape goat.
putting the 'B' in LGBTQ+
In my experience in these matters, it wasn't the code, it was the fact that management kept disagreeing with the results and changing the assumptions until the answer became something they wanted to hear.
If you think deeply enough, you will have no single direction for your outrage.
I did a gig at M*rg*n St*nl*y in London for a couple of months, on the options floor.
I got that via a connection to Standford theoretical physicist who'd found loadsa money that way (I used to be a CERN experimentalist).
They were all fascinated with the Black-Scholes pde; but no-one - I mean NO-ONE - had any clue what the model was about.
They just hired geeks to make up a number.
One of the in-house coders (and they are good coders, and paid) had to stick a random-number generator onto the back of a calculator for a set of exotics.
He presented the available information. It wasn't 'accurate' enough. So - quit, or stick in spurions. He did the latter.
It is NOT rubbish data in. It's a complete inability to understand what to do with the data.
Down with categorical imperatives
... but not to big to have their CxO's doing some jail time for supporting that.
If nothing happens then those same people are just going to find ANOTHER dodge to exploit. Just like the Savings and Loan debacle.
There will always be SOMETHING that can exploited. Close the loopholes ... but also jail and fine the people who orchestrated this. And every other exploit.
One of the downsides of free markets is the inevitability of boom and bust cycles
That is NOT a downside of free markets. That is a downside of having a central bank issuing fiat currency at essentially arbitrary interest rates that do not necessarily reflect current savings and consumer preferences.
F.A. Hayek won an Economics 'Nobel' on that work, by the way.
People fail and succeed all the time in a free market, that's good and healthy for the economy, but when everyone fails at once, you can be sure there's a central bank and an Alan Greenspan fucking everything from up on his planner's high tower.
What's wrong with your argument is that you're focusing on the symptoms and ignoring the cause. Companies DO have accountability, Lehman Brothers went bankrupt, AIG is broke on Federal life support, everybody who indulged in that binge is now dead or dying. Except the government isn't allowing the failures to fail, and in doing so they're rewarding idiocy and punishing competence. I say it is government that needs accountability.
Send your spendthrift head of state this
Most of the risk models are based on the Black-Scholes theory of options pricing. The assumptions of the model are basically small, normally-distributed perturbations. The "unseen hand" is guiding things.
What it can't model is boom-and-bust situations. The mathematics of boom-and-bust ran CRT-type TV sets for years. The horizontal sweep in a TV set is a sawtooth oscillator that builds up linearly and then collapses and starts over again. The math is non-linear, and has been studied.
But the "unseen hand" doesn't do booms and busts. It efficiently self-corrects. Real markets sometimes boom and bust. What got in the way of proper modeling was probably a combination of ideology and the common tendency to leave out of models the things that are not easily tractable.
There's a simple reason for that. Apparently a lot of Indian companies use these low priced outsourced coding contracts as a training ground for new employees - hence the very high turnover of developers as they get promoted off your project. When you go for a bargain basement price and cede all control you get consequences. One of the many rules that has been completely forgotten over the last few years is that you need at least enough employees to be sure that the contractors are being honest. They do not actually work for you, they use you as a source of cash flow and will cut corners to increase that no matter where they are based.
It _was_ not a mistake at all. Think about it a bit more.
Printing money allows the US Gov to tax the rest of the world at will.
Commodities like oil, wheat, cooking oil, orange juice, milk, DRAM, CPUs are all traded in US dollars.
This means most of the countries in the world need to collectively hold trillions of US dollars to buy this stuff. I suspect there's more USD held by non-US entities than US entities.
If China or Japan do not have enough US dollars to buy oil, they sell stuff for them (it doesn't even have to be to the USA- other countries will buy them in USD). If China/Japan has more US dollars than they know what to do with, they often lend it to the USA and others (who promise to pay back in USD).
So what happens if the USA prints more money? The US Gov has more US dollars, the US citizens become poorer (boohoo), but more importantly, it means the rest of the world holding trillions of USD become poorer.
If you were Zimbabwe, and printed money, your citizens start having to use wheelbarrows to buy bread while the rest of the world just laughs at you or pities you.
Whereas if you were the US Gov and printed money the rest of the world is living in your "Zimbabwe" and using your currency. The US Gov hands some of the printed money to the US citizens (cronies) so that they will continue to help prop it up.
Thus overall it does not hurt the USA as much as printing money hurts a country like Zimbabwe. As long as the US Gov (Mugabe) hands over a cut to the citizens (cronies), the USA as a whole does OK.
Now the thing is Iran is selling oil in Euros. This undermines things a bit for the USA.
It's no fun printing money and having the rest of the world just laugh at you, instead of getting poorer.
BTW Iraq switched to selling oil in Euros before they got invaded. Naturally after they got invaded they switched to selling oil in US dollars.
Not saying that's _the_ reason why they were invaded. As they said, there were many reasons for invading Iraq.
Now the US citizens (cronies) have to be vigilant and see if their "Mugabe" is "cutting" them out from their share of the printed money. So they should regularly remind "Mugabe" that he needs them to stay in power (but is that still true?).
It would be bad for them after all, if it turns out that "Mugabe" has new cronies and has cut them out completely.
This whole mess is a failure of socialist banking policy NOT capitalism or free market ideas.
Horse poo. It's nothing to do with socialism. There are much more regulated (let's drop the "socialist" distraction) economies out there, and they just aren't doing as badly in this little mess as is the USA.
It was a property market bubble, and bubbles are a result of unreasonable investor optimism and confidence. There were a few extra contributors to this little problem, but let's not pretend that libertarianism is the answer when there are NO libertarian societies out there in the real world doing better.
Don't get the idea I don't like Americans or the USA. I do---I like you because you're all gooey, ambitious and optimistic, even if that makes you prone to economic bubbles. I hope you get through this problem just ducky. But you do have too much belief in money, and I hope this beats it out of you.
In an unregulated market fractional reserve lending should be prosecuted as fraud. It is fractional reserve lending that is the root cause of the collapse in the money supply.
No, re-read my post. It was pure greed and financial malfeasance which led to the "collapse" of the credit markets. (it's not a collapse either because the federal reserve still lends to financial institutions. Government interference prevents the economy from utterly collapsing in situations like this)
This is entirely due to government regulation.
"Regulation" is, fundamentally, government compelling a sector of private commerce to behave a specific way. The presence of the Fed does not compel a bank to engage in fractional reserve lending, in this case it merely allows it.
The banking industry has been structured upon fractional reserve lending since it arose. They don't make profits by simply holding the deposited assets. They loan out a fraction of what their patrons deposit to earn profits through interest. An (arguably beneficial) side effect of this is the "money multiplier" effect that makes the world go round. (It is arguable that the industrial revolution and our modern, technological age would not have arisen in the absence of this economic force.)
Fiat money precludes the possibility of a free market and even with an ostensibly gold backed currency is in reality a fiat currency if the government allows fractional reserve lending.
Given that you agree that fractional reserve lending and the money multiplier effect mean that even gold based currency is equivalent to fiat money, then, given the history of banking, your assertion that fiat money precludes the possibility of a free market is refuted by centuries upon centuries of commerce.
In light of this, your whole rant here strikes me as incoherent.
There is some real irony here in your post.
If you believe fractional reserve lending is, in fact, fraud, then what you are advocating is...drumroll please.... a regulation prohibiting that practice.
In fact, the federal reserve system imposes a minimum required reserve on bank systems, which artificially decreases the quantity of money "fraudulently produced" through fractional reserve lending.
They used to take much greater risks in their lending because the first rule of the free market is profit. This resulted in a lot of people losing their savings when banks lost all their liquid assets in loan defaults during the depression.
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