A $50 million margin call? I'll short Wall Street.

Sunday, July 20, 2008. Evening.

Hyde Park, Chicago.

It was almost dark when Goolsby parked his Toyota Camry in a parking space in the University of Chicago faculty housing area.

The drive back from Greenwich took nearly ten hours, with only one stop at a gas station in Pennsylvania where I bought a cup of coffee and a barely edible microwaved sandwich.

He didn't choose to fly. Not because he wanted to save money, although he certainly didn't like spending campaign funds on plane tickets.

It's because he needs those ten hours.

He needed a long enough period of time, free from phone calls and emails, to process what he had heard in that side room that afternoon.

For the first two hours after leaving Greenwich, his mind was still in a state of excitement. It was like listening to an extremely brilliant report at an academic conference—his intellect was stimulated, his cognitive framework was stretched, and some things that were previously vague suddenly became clear.

The things Walker talked about—the divergence between CDS spreads and stock prices, the run mechanism of overnight repurchase agreements, and the mutually strangling chain structure formed between investment banks through ISDA agreements and collateral chains—were things he had either not paid much attention to before, or only had a very superficial conceptual understanding of.

The scholar's curiosity took over for the first two hours. He even kept a pen in the cup holder next to the steering wheel and jotted down a few keywords on the back of a gas station receipt while waiting at a red light.

"Gamma exposure of synthetic CDO".

When he wrote those words, he admitted that he did not fully understand the precise meaning of Gamma in this context.

But he understood the core meaning Lu Ze conveyed through the mountaineer's analogy: these organizations weren't standing independently on the edge of the cliff; they were tied together by ropes. If one fell, the rope would pull the others down with it.

"Refusing to answer the phone" is an extremely specific image that Lu Ze used to describe the bank run mechanism.

A trader rejects a phone call at nine in the morning. It's not some massive systemic collapse; it's just one person, one phone, and one "no."

But this single "no" will be copied into hundreds or thousands of "no"s within a few hours.

By the third hour, the excitement began to wane. It was replaced by something heavier.

Anxiety, a kind of unease that made Goolsby feel that he, or most macroeconomists, had overlooked an entire dimension.

He taught economics at the University of Chicago for over a decade. His models included GDP, interest rates, employment rates, inflation expectations, and consumer confidence indices. These macroeconomic variables formed a well-functioning framework capable of explaining most economic phenomena.

But the world Walker showed him today—the underground network of tens of thousands of ISDA agreements, trillions of dollars in notional principal derivatives contracts, and hundreds of billions of dollars in overnight repurchase transactions every day—was not in his model.

It wasn't because he deliberately ignored it. It was because he had never known it looked like that before.

Macroeconomics looks at the buildings on the ground. GDP is the total area of ​​the buildings, interest rates are the height of the buildings, and the employment rate is the number of people living in them.

From the ground, the buildings of the American economy, although cracks have appeared in some places, still retain their overall structure.

But Walker took him to the basement. He showed him the pipes. He showed him how much toxic pressure had accumulated in those pipes, and how dense and fragile the connections between them were.

What happens to buildings above ground if a pipe bursts?

Goolsby was smart enough that he didn't need Walker to answer the question for him.

In the fourth to sixth hour, he began to mentally rehearse the scenarios.

Although he had no data, no model, only the qualitative descriptions and a few specific figures he had heard that afternoon, he was a well-trained economist. Even with only qualitative information, he could construct a rough, directional framework for scenario analysis in his mind.

Scenario 1: Paulson's rocket launcher successfully deterred the market. Fannie Mae and Freddie Mac stabilized. Confidence recovered. Lehman Brothers found investors or buyers.

The crisis subsided in a slow, controlled manner. The recession was mild, perhaps lasting two or three quarters, before a recovery.

This was his baseline scenario. It is also the underlying assumption of the current economic policy framework of the Obama campaign.

Scenario 2: The deterrent effect of rocket launchers is limited. The problems of Fannie Mae and Freddie Mac are temporarily suppressed, but Paulson is forced to actually take over in the summer.

The takeover of Fannie Mae and Freddie Mac consumed a significant amount of the government's political capital. In the fall, problems erupted at Lehman Brothers or some other large institution. The government, having exhausted its political capital, was unable to provide timely assistance. One or more large financial institutions collapsed.

As Goolsby drove onto the Pennsylvania freeway, he began to seriously examine the situation.

Previously, he would categorize it as a "tail risk"—a low probability, not worth spending too much time on.

But the things Walker talked about this afternoon—the continued widening of CDS spreads, the erosion of trust in the overnight repo market, and the contagion chain of mutual killing among investment banks—these micro-level pieces of evidence tell him that the probability of scenario two may be much higher than he previously thought.

Moreover, Walker's final assessment from a political perspective left a deep impression on him.

Walker places the contagion mechanism at the financial level and the decision paralysis at the political level in the same framework.

The financial crisis is rapidly depleting political capital.

The depletion of political capital made it impossible to implement a bailout.

The lack of bailouts led to a further deepening of the financial crisis.

The deepening financial crisis continues to deplete political capital.

A spiral.

Goolsby had never thought about this problem in this way before. In his academic framework, financial policy and political constraints were two separate variables. But Walker has welded them together today.

Moreover, the welding was very convincing.

Scenario 3 -

As Goolsby constructed the third scenario in his mind, he found himself reluctant to continue thinking about it. Not because he couldn't think of anything, but because what he did think of made him uncomfortable.

Scenario 3 is an upgraded version of Scenario 2. It's not just one large financial institution failing, but multiple ones. It's not a slow credit contraction, but a systemic liquidity freeze. It's not a mild recession, but the deepest economic crisis since the Great Depression.

Two months ago, he would have treated Scenario 3 as a joke.

Today, he treats it as a possibility that needs to be taken seriously, even if the probability is still not high.

The difference lies in the sounds heard from those pipes that afternoon.

When he got home that evening, Goolsby didn't rest immediately. He opened his laptop and began doing something he often did in academic research but had never done in campaign work.

Researching information.

He wasn't looking at the public reports he read daily on CNN and in The New York Times. He was looking at the micro-data he'd only heard about this afternoon—data from the underground pipes of Wall Street.

He retrieved Lehman Brothers' CDS spread chart from Bloomberg's public database.

Then it's Merrill Lynch. Citibank. AIG.

He looked at the four curves together.

The trend is consistent. They're all moving upwards. The speeds differ, but the direction is the same.

Then he looked up an indicator he had never proactively looked up before: the TED spread. The difference between the interbank lending rate and the US Treasury bond rate measures the willingness of banks to lend to each other.

The TED spread has risen from 80 basis points to over 110 basis points in the past month.

He wasn't a fixed-income expert, but he knew what this number meant: banks were becoming less willing to lend money to other banks.

Then he did something more time-consuming. He downloaded Lehman Brothers and Merrill Lynch's most recent quarterly 10-Q reports from the SEC's public database and went down to the disclosure page for Tier 3 assets.

Lehman Brothers' Tier 3 assets. Merrill Lynch's Tier 3 assets. He divided these figures by their respective shareholders' equity.

The calculated ratio made him sit in front of the computer for a while without moving.

He recalled Walker's words: "You can't price a company whose balance sheet hides billions of dollars in black boxes."

"Black box".

Level 3 assets are black boxes. There are no market prices, no comparable transactions, and valuations rely entirely on the company's internal models. This means that those numbers—the tens of billions written on the books—may be real, or they may only be worth half that, or even less. External investors have no way of verifying them.

Goolsby wasn't a financial engineer; he couldn't determine the "true" value of those Tier 3 assets. But he was an economist, and he understood the cost of uncertainty. When the true value of a key variable cannot be observed, market participants automatically assume the worst. Because in the face of uncertainty, pessimism is rational.

But what if everyone simultaneously chose to be pessimistic...?

He closed his laptop around 1 a.m.

It wasn't because he had finished his research, but because he found himself walking step by step along the path Walker had laid out that afternoon, leading him to a place he didn't really want to go.

He needs to get some sleep.

But he didn't sleep well.

.....

The following morning, Goolsby met Obama in his University of Chicago office.