Tag Archive 'credit crunch'

Jul 22 2010

Banking ‘stress test’ is scenario planning by another name, with limitations

Preliminary results of the European banking stress test are to be published by the Committee of European Banking Supervisors tomorrow (July 23.) Although the exact nature of the tests have remained under wraps — not without controversy — the essence is clear. Regulators are simulating various forms of adverse financial conditions (GNP performances, interest rates, currency values and flows, and other money metrics) to see if important banks have the resources to withstand these conditions.

Controversy has resulted from lack of transparency in the tests, leading to speculation that they are designed to have most banks “pass” in order to boost confidence — as clear an example of mixing up judgment and advocacy as one is likely to get.

The key measure for determining which of the 91 banks fail the test — and need to raise capital — is whether their Tier 1 capital ratio would fall below 6% under the “loss assumptions” imposed by the test. This is the same level that was required in the stress tests of U.S. banks in its similar May 2010 test.

Model worlds

Anyhow, what is particularly interesting to this author is that the concept “scenario planning” has not been used through the bank test process, but these tests are fundamentally future scenarios, this is what scenarios are all about: creating model future worlds that express the evolution of important uncertainties towards somewhere at the limits (but not beyond) of plausibility, with the specific intent to use these worlds to stress test current decisions as to what a company is and does — from its business model to its resource base to product line to marketing, and so on.

If the organization’s key decisions would hold up (produce profitability or however success is defined) in different, alternative tests, this tells managers theirs are probably good decisions for the future. If they would flop in any test, this points to what needs to be urgently addressed. In this way an organization explores and becomes robust to its unknowable and unpredictable future.

Notably, it is precisely the stress-test purpose of scenarios that stops this foresight technique becoming (as it does all-too-often in the wrong hands) a “wishing well” for better times. When scenarios cease to be direct stress tests of present decisions, they become floaty indeed.

Full scenarios

Having said all this, the difference between the US and European banking stress tests and full scenario work is the bank tests are considering only economic factors, only adverse (risk) conditions, and only “known unknowns.” Full scenarios would include the full range of important drivers of change — and potential surprises — outside of economics or finance in their construction. In operating as stress tests, they would look at threats to the status quo as the bank tests do, but also provide a testbed for exploring opportunities in change.

Post to Twitter Tweet This Post

4 responses so far

Nov 05 2009

Could America default on its debt? And what the past tells us about the future

In Monday’s Washington Post, under an Op-Ed headed ‘Could America Go Broke?’ columnist Robert Samuelson raises the prospect of the U.S. or another major economy defaulting on its national debt. Says Samuelson: “It’s still a very, very long shot, but it’s no longer entirely unimaginable. Governments of rich countries are borrowing so much that it’s conceivable that one day the twin assumptions underlying their burgeoning debt (that lenders will continue to lend and that governments will continue to pay) might collapse… The question is so unfamiliar that the past provides few clues to the future.”

Well, this raises the question of whether the past tells us anything about the future, and if so what? There’s a common wisdom attributed to Mark Twain (why is it that aphorisms are always attributed to Twain or Winston Churchill?) that goes: “History doesn’t repeat itself, but it often rhymes,” and this is the position that most educated future-thinkers would hold.

So what would the ‘rhyme’ be? From cases such as Argentina, Russia, South Africa, and many developing world countries over the past 50 years: lenders loose confidence in a country’s ability to repay on its national bonds and stop lending; the country is faced with a choice of drastic spending cuts (great social and humanitarian cost) or major tax increases (pointless, because it stifles business, therefore lowers tax revenue) or default. Going broke, into national “Chapter 11,” suing for time and ‘debt restructuring’ becomes the best among the bad options event though it pretty much ensures a deep and dark recession.
.
Thinking the unthinkable

Could this be the future of America? As I’ve written before here and other places, after the ‘unimaginable’ Credit Crunch was ignored due to its ‘low probability,’ it’s a relief to know that remote but plausible outcomes with serious consequences are getting attention, at least in the Washington Post.

Clearly major economies are in a more precarious situation than they were 5 years ago. Too much debt is always precarious, for the smallest household or the biggest country alike. On the other hand, an economy’s size and enduring wealth counts too. As Samuelson observes, it created the unexpected effect in Japan’s case where debt at 200% of GDP (America’s is currently about 40%) should have raised the cost of its debt (lower confidence of repayment) but this hasn’t happened because domestic Japanese households and businesses rather than foreigners have easily (and confidently) bought the debt — and this may well hold true for the U.S. too. In other words, the rhyme may go this way.

The ‘more likely’ future is incremental raising of taxes and lowering of public service provision as Western economies incrementally claw their way back to stability. But at least this default wild card on the margins of plausibility has the oxygen of some attention and this is no bad thing. As with all good foresight work, it predicts nothing, but it does allow us to think through the roadmap to the outcome, and press for the right decisions now, in plenty of time and in a measured way.

.

Post to Twitter Tweet This Post

No responses yet

Oct 29 2009

Unexpected prediction modesty highlights problems of timing and impact

Continuing the theme of financial types talking to each other about predictions and predictability, this ‘Tea with the Economist’ interview of Stephen Roach, Chairman, Morgan Stanley Asia by Economist New York Bureau Chief Mathew Birk, carries interesting lessons about the limits of prediction.


Birk commends Roach for being one of the few to have predicted the Credit Crunch problems, to which Roach demurs in saying he was “too early”. He then furthers his modesty in saying that the “breakage” in the financial system was “in excess of anything I envisioned.”

Self-deprecation in assessing one’s predictive abilities will endear anyone to me. Even Roach, who later in the interview burns this hard-won credibility by laying the blame for the credit crunch at the door of regulators, forgetting how hard financial institutions lobbied regulators for greater freedoms in the 1990s.

But I digress. The predictive issues the interview raises are as follows. Issue one: it’s not enough (as any stock short-seller will confirm) to get the direction of a future change right. One must get the timing right too. Issue two: it’s not enough to anticipate a change. One must be able to judge it’s impact. Getting either timing or impact wrong is effectively to have missed the future.

.

Probability

On the latter topic — the problem of impact — Nassim Taleb is unrelenting, and he is right. Analysts routinely mix up probability and impact. They think that because an event has a low probability (‘it would be a 10-sigma event!’) it can be marginalized in the predictive number crunching. Of course, it can’t. The low-probability of a wildcard or black swan event is irrelevant because when it happens it will change the game, and that’s why, in every predictive situation of reasonable complexity and uncertainty, using statistical extrapolations (regressions and so on) to predict, is to dangerously paper over the cracks. It is precisely the cracks that businesses and policy makers need to worry about.

Determining the direction of change is hard enough. Assessing timing or extent of impact — a ‘total future impact index’ — is wickedly difficult. It’s a task not to be underestimated, and to simply extrapolate current trends (= assuming the trend’s timeline and impact stay the same as in the past) is the royal road to underestimating it.

This is the reason foresight for complex, uncertain, changing situations can only be grasped by NOT predicting (quantitatively or otherwise) but by exploring the limit-conditions of the plausible (What would happen if the timing of the change accelerated, or was significantly delayed? What if  the impact was 10x or one tenth of what we expect? And so on.)

.

Post to Twitter Tweet This Post

No responses yet

Oct 19 2009

Perhaps some lessons in prediction learned as US dollar-demise scenario emerges

One of the benefits of scenario-based future thinking is the ‘permission’ to think through alternative future outcomes without necessarily predicting them. ‘Predictors’ focus, by contrast, on isolating the highest probability future in order not to have to think through or plan for less likely outcomes.


Predictions of the dollar’s demise are as old as the greenback itself of course, but over recent weeks the specter of the dollar heading way way below its trading range — a dollar crunch — has entered the zone of the credible, or, in scenario terms, the ‘cone of plausible uncertainty.’ That means decision-makers with lots at stake are taking it seriously.

Like the British pound, the dollar has been under a cloud due to perceptions of economic fallout from the credit crunch and global recession, but particular questions about the US currency have recently surfaced, driven by reports [Robert Fisk's 'The Demise of the Dollar' story in The Independent (Oct 6)]  that “Gulf Arabs are planning – along with China, Russia, Japan and France – to end dollar dealings for oil, moving instead to a basket of currencies including the Japanese yen and Chinese yuan, the euro, gold and a new, unified currency planned for nations in the Gulf Co-operation Council” (Saudi Arabia, Abu Dhabi, Kuwait and Qatar).

The subtext is far from merely financial. Practically, it would mean that on any day, the real cost of oil to US consumers and businesses would go up or down depending on the strength of the currency. This is something America is not used to. But, more deeeply, dropping dollar-denomination of oil is a direct shot across the bows of Washington’s say over oil affairs, and the hegemony of the dollar as the dominant global reserve currency.

De-dollarizing oil would not in itself push the US currency below its 25-year range. But it is portentous of the clear trend to a genuinely multi-power world, for better or worse, in which the dollar will get no favors. That will push the dollar down, at least while the news and fallout make their way through the financial and real economic systems.

Rumors of de-dollarization have been hotly denied, as further reported here, but as the Independent points out, denials are to be expected, and are always issued in these situations. They mean nothing. Even cub reporters know that.

.
Scenario thinking

What’s particularly interesting to me is that a ‘scenario’ of dollar demise has become not only plausible in the mainstream view of the future, but scenario thinking is being used as a way to consider the nature of this outcome, and how best to respond without predicting the outcome either way. As recently as directly pre-credit crunch, the media question would have been: ‘what is the best prediction for the dollar (or the housing market, or credit default swaps?) and that, rather then scoping out the implications of the lesser-likelihood, would have dominated the discussion.

So, what struck me forcefully in the Business Week video interview above, where BW Chief Economist Mike Mandel interviews the news magazine’s Economics Editor Peter Coy (see Coy’s underlying story here), is how the less-likely, non-predicted, but very significant outcome is actively addressed:

Says Coy: “It’s so hard to know what the dollar is going to do. We don’t argue that we know… what we do is we say, ‘it could happen’ and let’s take that possibility seriously, in the same way we should have taken the possibility of falling housing prices seriously…”

This is not formal scenario-building of course. But it is, fundamentally an adoption of the framework, saying in the classic ‘scenarios’ way: “we can’t predict if it will happen or it won’t, but if it does it will have significant impact. So let’s just ask: ‘what if ‘ it does and explore the outcomes and our responses. What will the word look like? What would be the implications, the knock-ons and spinoffs? If it comes to pass, what would be wish we had done today?”

Perhaps failing to predict the credit crunch has dented predictors’ halos enough to cause a mini-zeitgeist-shift towards the only real way to cope with important uncertainty: exploring all outcomes that pass the plausibility and significance test, whether or not we actually believe they will happen.

Post to Twitter Tweet This Post

No responses yet

Twitter links powered by Tweet This v1.6.1, a WordPress plugin for Twitter.