Showing posts with label Rational expectations. Show all posts
Showing posts with label Rational expectations. Show all posts

Thursday, July 18, 2013

Behavioral Bubbles and the Business Cycle

Writing at the Project Syndicate, Yale professor of economics and author of Irrational Exuberance Robert Shiller sees bubbles in Columbia and many parts of the world.  (hat tip Zero Hedge) [all bold mine]

From the world of rational expectations and efficient market hypothesis, Mr. Shiller points out that bubbles do not exist
This raises the question: just what is a speculative bubble? The Oxford English Dictionary defines a bubble as “anything fragile, unsubstantial, empty, or worthless; a deceptive show. From 17th c. onwards often applied to delusive commercial or financial schemes.” The problem is that words like “show” and “scheme” suggest a deliberate creation, rather than a widespread social phenomenon that is not directed by any impresario.

Maybe the word bubble is used too carelessly.

Eugene Fama certainly thinks so. Fama, the most important proponent of the “efficient markets hypothesis,” denies that bubbles exist. As he put it in a 2010 interview with John Cassidy for The New Yorker, “I don’t even know what a bubble means. These words have become popular. I don’t think they have any meaning.”
Contra EMH, Mr. Shiller says that bubbles are not rational
In the second edition of my book Irrational Exuberance, I tried to give a better definition of a bubble. A “speculative bubble,” I wrote then, is “a situation in which news of price increases spurs investor enthusiasm, which spreads by psychological contagion from person to person, in the process amplifying stories that might justify the price increase.” This attracts “a larger and larger class of investors, who, despite doubts about the real value of the investment, are drawn to it partly through envy of others’ successes and partly through a gambler’s excitement.”

That seems to be the core of the meaning of the word as it is most consistently used. Implicit in this definition is a suggestion about why it is so difficult for “smart money” to profit by betting against bubbles: the psychological contagion promotes a mindset that justifies the price increases, so that participation in the bubble might be called almost rational. But it is not rational.

The story in every country is different, reflecting its own news, which does not always jibe with news in other countries. For example, the current story in Colombia appears to be that the country’s government, now under the well-regarded management of President Juan Manuel Santos, has brought down inflation and interest rates to developed-country levels, while all but eliminating the threat posed by the FARC rebels, thereby injecting new vitality into the Colombian economy. That is a good enough story to drive a housing bubble.

Because bubbles are essentially social-psychological phenomena, they are, by their very nature, difficult to control. Regulatory action since the financial crisis might diminish bubbles in the future. But public fear of bubbles may also enhance psychological contagion, fueling even more self-fulfilling prophecies.
And bubbles eventually pop…
One problem with the word bubble is that it creates a mental picture of an expanding soap bubble, which is destined to pop suddenly and irrevocably. But speculative bubbles are not so easily ended; indeed, they may deflate somewhat, as the story changes, and then reflate.

It would seem more accurate to refer to these episodes as speculative epidemics. We know from influenza that a new epidemic can suddenly appear just as an older one is fading, if a new form of the virus appears, or if some environmental factor increases the contagion rate. Similarly, a new speculative bubble can appear anywhere if a new story about the economy appears, and if it has enough narrative strength to spark a new contagion of investor thinking.
This is what happened in the bull market of the 1920’s in the US, with the peak in 1929. We have distorted that history by thinking of bubbles as a period of dramatic price growth, followed by a sudden turning point and a major and definitive crash. In fact, a major boom in real stock prices in the US after “Black Tuesday” brought them halfway back to 1929 levels by 1930. This was followed by a second crash, another boom from 1932 to 1937, and a third crash.

Speculative bubbles do not end like a short story, novel, or play. There is no final denouement that brings all the strands of a narrative into an impressive final conclusion. In the real world, we never know when the story is over.
In the real world, speculative bubbles operate on cycles. A boom is followed by a crash. Why there seems to be “no final denouement” on these episodes has been that policy responses to bubble crashes has been to “reflate” unsustainable bubbles, ergo the repetition, the cycles. Social policies have essentially been designed to prevent the market clearing process.

The other reality is that the “social-psychological” phenomenon of every bubble is a symptom rather than a cause, since peoples actions does not emerge from a vacuum. The behavioral aspect represents a narrative of people’s reactions to a largely “unseen” stimulus which prompts the “herding or lemming effect” and thus resulting to “irrational exuberance” or speculative bubbles.  

Yield chasing actions, thus are “rational” from an individual’s ex-ante point of view and “irrational” from an “ex-post” (hindsight is 20/20) perspective or from a third party interpretation of an evolving bubble, similar to me or to Professor Shiller.

In other words, "rationality" represents the time inconsistent dilemma on the individuals and on the markets. And that the yield chasing dynamic attendant to these events signify as the immediacy effect or temporary discounting.  

Another reality is that grand bubbles will hardly exist WITHOUT resources fueling them.

Thus the limitations of people’s highly exuberant behavior and actions or “speculative bubbles” will ultimately depend on the limits of resources that enables and facilitates such activiites. 

As Austrian economist Roger W. Garrison explained, first "you can’t just spend expectations" and importantly, (bold mine)
individuals who are in possession of increased money balances and who have correct, or rational, expectations still may not spend in a pattern consistent with the New Classicist view. A spending pattern that is internally inconsistent on an economywide basis does not necessarily imply inconsistency for the individual. That is, macroeconomic irrationality does not imply individual irrationality. An individual can rationally choose to initiate or perpetuate a chain letter—sending one dollar to the person on the top of the list, adding his name to the bottom, and mailing the letter to a dozen other individuals—even though he knows that the pyramiding is ultimately unsustainable. Similarly, it is possible for the individual to profit by his participation in a market process that is—and is known by that individual to be—an ill-fated process. So long as it is possible to buy in and sell out before the process reverses itself, rational expectations may exacerbate rather than ameliorate the misallocation of resources induced by monetary expansion.
To repeat, people’s actions doesn’t operate on a vacuum. 

Social policies are hardly neutral, they shape people's incentives and action. Monetary policies via credit expansion serve as the fuel for every bubble.

Friday, October 14, 2011

Quote of the Day: Sargent-Sims knees the groin of Hayek

From Professor Arnold Kling on the 2011 Nobel Prize winners Thomas J. Sargent and Christopher A. Sims, (bold emphasis mine)

Rational expectations in the Sargent-Sims tradition treats everyone as having the same model with which to form expectations. As Frydman and Goldberg point out in Imperfect Knowledge Economics, this assumes away the local knowledge and tacit knowledge that Hayek correctly identified as being very important in the economy.

Indeed, if Sargent and Sims represent a slap in the face to Keynes, they must be regarded as a knee to the groin of Hayek. Hayek coined the term "scientism" to describe the pretentious pose that economists strike when they equate mathematics with rigor. If scientism is a germ that infects economics, then Sargent and Sims were responsible for unleashing some of the most virulent strains.

Sunday, July 10, 2011

The Causal Realist Perspective to the Phisix-Peso Bullish Momentum

Strictly unedited. I am in a hurry so I won’t be posting a quote for today.

It would seem as another victory lap for us considering that events continue to validate our assessment and prognosis of the markets.

Last week, we focused on several clues which possibly heralded on the next major move of the market over the short and medium term. This week highlighted the fulfillment of this short term prognosis.

This remarkable substantiation by the market of our analysis justifies as another “I told you so” moment.

Again, all signs have been in apparent consolidation, which prominently foretells of this rapturous pivotal moment of truth: bullish chart formation, rallying peso, improving market breadth, expanding bullish sentiment of both local and foreign investors, and now the transition from divergences to convergences in the price actions of global equity markets.

It has definitely been a rare instance to see all these variables move in harmony, which gives us further confidence to say that the next leg up should account for as a major move (barring any external shock)

The Causal Realist Approach versus Mechanical Charting

I would like add to my previous discourse about the ubiquitous brilliance of everyone during bullmarkets especially when applied to the value of charts.

As previously noted[1] charts should function as guidepost to measure theory. Charts should not be substituted for theory.

From a Mengerian causal-realist perspective, the search for cause-and-effect relationships or causal laws "exact laws" in the marketplace under the fundamental economic dimensions such as prices, wages and interest rates, as observed in reality should be the imperative analytical approach.

As Dr. Carl Menger wrote on the preface of his magnum opus[2], (bold highlights mine)

I have devoted special attention to the investigation of the causal connections between economic phenomena involving products and the corresponding agents of production, not only for the purpose of establishing a price theory based upon reality and placing all price phenomena (including interest, wages, ground rent, etc.) together under one unified point of view, but also because of the important insights we thereby gain into many other economic processes heretofore completely misunderstood. This is the very branch of our science, moreover, in which the events of economic life most distinctly appear to obey regular laws”

In other words, mechanical charting does not establish the cause and effect relationship of economic variables relative to the possible distribution outcomes that would be reflected on future prices.

Instead, mechanical charting assumes that all relevant information have been incorporated in past and present prices from where patterns and formations are used as the principal metrics to ascertain future prices or outcomes.

All these are based on historical determinism where past performance is presumed to sufficiently impute the necessary statistical relevance to produce high rates of predictive successes.

This echoes the highly flawed Efficient Market hypothesis[3] which sees financial markets as “financially efficient” which have been founded on Rational Expectations theory[4] which similarly sees errors as emanating from ‘random’ factors than from inherent knowledge asymmetry, in the assumption that “outcomes that are being forecast do not differ systematically from the market equilibrium results. As a result, rational expectations do not differ systematically or predictably from equilibrium results”.

With the way various government interventions has been distorting the distributional balance of the marketplace and the economy, information asymmetry has been magnified enough to undermine such assumptions—and this is precisely why boom bust cycles exists!

Warren Buffett has been right. There won’t be the investment savant Warren Buffett whom we know of, if financial markets resembled ‘efficiency’.

To quote Mr. Buffett[5],

I'd be a bum on the street with a tin cup if the markets were always efficient.

Investing in a market where people believe in efficiency is like playing bridge with someone who has been told it doesn't do any good to look at the cards.

It has been helpful to me to have tens of thousands (of students) turned out of business schools taught that it didn't do any good to think.

Bottom line: Each tool has its proper use.

The Causal Realist Perspective to the Phisix-Peso Momentum

clip_image002

Applying the Causal-Realist approach to the local markets, a review of the Phisix chart (black candle) reveals that last week’s head and shoulder breakout (blue trend line and light blue arcs) was further confirmed by this week’s .92% advance (violet circle). Year-to-date, gains of the Phisix have accrued to 4.53% the highest for 2011.

However, the local benchmark attempted a similar breakout from the nominal all time high record set last November at 4,413 (green horizontal line) but apparently was repulsed by intra-week profit taking.

This resistance level poses as the NEXT TARGET which I think should be encroached anytime soon.

The Philippine Peso (red candle) further confirms the action of the Phisix.

The Peso’s continued rise vis-a-vis the US dollar decline appears to be representative of the relative demand for Peso assets. Part of this can be seen through the actions of foreign fund flows into the Philippine Stock Exchange. Fund flows can also happen to other domestic assets as real estate, bonds, FDIs or etc...

I pointed out last week that foreign buying manifested seminal signs of expansion as the Phisix crawled higher prior to these colossal breakouts.

This week, net foreign buying nearly trebled. This was apparently boosted by Metro Pacific Investment’s [PSE: MPI] $200 million (P 8.64 billion) private placement[6], half of which was subscribed by MPI parent First Pacific Co. of Hong Kong.

clip_image004

Yet the Peso’s action (yahoo lower window) seems congruent with the actions of Asia’s currencies.

The ferocious rally of the Peso (1.01%) this week was equally reflected on the Bloomberg-Reuters ADXY (a basket of Asian currencies, upper window) although the latter’s gain came at a much modest pace.

And the rally on Asian currencies seems to have been bolstered by net foreign inflows into the region. But this week’s inflows comes with a particular oomph for the Philippines, according to the Emergingmarkets.me[7] (bold emphasis mine)

Asia funds attracted the greatest volume of new money, totalling $634 mln and equal to 0.26% of AUM. China funds attracted $355 mln (0.4% of AUM), their best week since end April as investors were not put off by the disappointing PMI Manufacturing report and prospects for further rate rises. In terms of % of AUM, Philippine funds attracted the most new money equal to 12.4% of AUM[8] and Malaysia funds reported new money equal to 7.5% of AUM

This explains the significant role of the Peso’s outperformance.

Similarly the buoyancy of Asian currencies has been manifested on the equity markets where most of Asian bourses have posted advances.

clip_image006

ASEAN markets seem to have reconverged and has exploded this week.

Despite Thailand’s SET amazing 4.51% post election jump (red orange), the SET remains slightly off the recent highs compared to this week’s simultaneous breakouts of the Indonesia’s JCI (orange) and Malaysia’s KLCI (red).

Of course the Phisix (green) is just about to surpass the record threshold set last November, along with her neighbors.

As one would note, evidences all add up to suggest that this nominal resistance level, which the Phisix attempted to breakout, will likely be history in the coming sessions.

The reconvergences of ASEAN and Global Equity markets could be adding fuel to the bullish momentum.

Secondary Effects: Market Sentiment, Breadth and Sectoral Gains

Despite the hefty gains by the Peso predicated on foreign inflows, local investors still dominates trading, the share of foreign transactions as % to total trade (in Pesos) remain below 50% (green line).

clip_image008

This implies that aside from the growing positive sentiment being exuded by foreign entities, locals have been net buyers, which also suggest that locals have been turning broadly sanguine.

And this buoyant sentiment has been clearly reflected on the improvements in the sectoral performance, market internals and market breadth.

clip_image010

The advances have been broad based. Basically, ever sector posted gains.

However, the industrial sector vastly outclassed all other sectors powered by hefty gains of San Miguel, Petron and Universal Robina. In second place was the Property sector which had been followed by the mining and oil sector.

So apparently we seem to be encountering signs of the rotational process at work

This brings us to Peso volume.

clip_image012

As I said last week, (bold emphasis mine)

A rising Phisix will induce more trades that will be reflected on volume expansion. That’s how reflexivity theory incentivizes people: As prices go higher more people will start chasing prices and higher prices will be read as improvements on economic and corporate output which will further lead to rationalizing of price chasing dynamics, hence, the feedback loop.

In further validation of our observation, the surge of the Phisix has been accompanied by a spike in Peso weekly volume. Although part of this jump can be attributed to the special block sales of the MPI.

We should expect the ascendant Phisix to be accompanied by higher volume. The growth in volume should confirm the strength and the continuity of the current uptick. [Of course we can argue how this reflexivity feedback mechanism will be financed. But this won’t be my story today]

Bottom line: All these demonstrates how the Austrian causal-realist theory is strongly being confirmed or supported by current market actions whether seen in the Peso or the Phisix or Asian equities and currencies.

These indicators seem to be reconverging to reinforce our prediction that momentum will strongly favor the bulls where a successful breakout from this nominal resistance level should posit that the Phisix will likely be headed for the 4,900-5,000 level at the end of the year.

And as with last week’s experience, no trend will move in a straight line.

We are likely to see vastly mightier upside actions than downside swings over a cumulative basis. Such actions will be represented through the price trends.

Yet barring any emergence of fat tail risk, we should expect this bullish momentum to continue.

Post Script: Seasonal Forces and US Consumer Credit Growth

As a final thought, some might argue that the strength we are seeing this July could signify as seasonal forces at work. And that the next two months, which traditionally represent the weakest seasonal link, could jeopardize or upset this evolving dynamic.

clip_image013

While seasonal factors may have some statistical influence over the markets over the past years, as shown in the chart above[9], which applies to the US and which would have a spillover effect to the Asian region, given today’s highly fluid environment where the marketplace has constantly been bombarded with all sorts of government interventionism, my impression is that the cumulative effects of these policies will tend to overrule the influences of seasonal forces.

In addition it’s worth pointing out that consumer credit growth in the US has been vigorously expanding[10].

clip_image015

While others may see this as constructive, once the trillions of dollars in excess reserves held at (and created by) the US Federal Reserve for the banking system[11] (right window), will be converted into loans (probably consumer loans) then we should see further spike in inflation down the road (yes this means higher commodity prices). Thus, the current surge in US equities could be reflective of this inchoate symptom, which again could be a factor in taking precedence over seasonal forces.


[1] See I Just Can’t Get Enough: Philippine Phisix Emits Intensely Bullish Signals, July 03, 2011

[2] Carl Menger, Principles of Economics, Preface p. 49, Mises.org

[3] Wikipedia.org Efficient-market hypothesis

[4] Wikipedia.org Rational expectations

[5] Optimmumz.com Efficient market hypothesis

[6] Inquirer.net Metro Pacific raises P8.64B to finance infrastructure projects, July 8, 2011

[7] Weafer Chris WEAFER COMMENT: Equity fund flows: Keeping the faith…but hedging the specifics July 8, 2011 EmergingMarkets.me

[8] AUM means Assets Under Management.

[9] Chartoftheday.com Dow Average Monthly Gain

[10] Federal Bank of Cleveland Data Updates, July 8, 2011

[11] Federal Reserve Bank of St. Louis Graph: Excess Reserves of Depository Institutions (EXCRESNS)