"Disciplined Systematic Global Macro Views" focuses on current economic and finance issues, changes in market structure and the hedge fund industry as well as how to be a better decision-maker in the global macro investment space.
Thursday, June 19, 2025
Hedge fund start-ups - a thing of the past
The Fed always to the rescue?
from @greg_martis
Innovation and change impacts quant results
Corporate bond stress falling - what will it take to change spreads?
Wednesday, June 18, 2025
Gold and central banks - Do what we do not what we say
Monday, June 16, 2025
Market macrostructure matters
Sunday, June 15, 2025
Causal discovery and trading
Causal discovery techniques can help any quantitative hedge fund, but may be especially helpful for enhancements to trend-following through finding causal links with other markets. The basic structure for a trend-following model is to use past values of a variable to extrapolate ot the future. Look for the trend, yet it would add significant value if you could learn whether other markets may have some causal impact on another variable.
The standard approach to time series causality is to use Granger causality tests, which simply determine whether some time series Y causes or has an impact on the prediction of X. However, a growing number of alternative techniques are available to aid in causal discovery, thereby improving trading, such as time series data causal inference, vector autoregressive linear non-Gaussian acyclic models, and time-varying interactions models for nonlinear observations. The code for these algorithms is already written, so it is relatively easy to implement for a set of assets.
We are not planning to explore all of these techniques, but there are ways to support better causal discovery that can be used to improve the inputs in investment strategy. See "Trading with Time Series Causal Discovery: An Empirical Study" for a simple application of causal discovery for long-short equity portfolios. Now, these algorithms are not easy to implement due to the time required for computation; however, this seems to be a fruitful area for further research, especially given the growing interest in causal reasoning in finance.
Choose your correlation carefully - Kendall's Tau
Tuesday, June 10, 2025
The impact of narrative: The power of Fed speak
Thursday, June 5, 2025
The power and gravitation pull of doing nothing in asset management
Sophisticated investors and market efficiency
Market efficiency will vary by the type of investor. There are different levels of efficiency based on your structural advantage. Market efficiency is based on the behavior of a given market and not on the profitability of a given trader. Hence, you can declare a market as efficient, yet there could still be profitable investors. Similarly, market efficiency could be rejected, yet that does not ensure an investor can make money in that market.
For retail investors, the market is very efficient. You cannot get an edge if you are slow to react, have less information than other investors, process the information poorly, and have high transaction costs. If you are an institutional trader, your sense of efficiency is different. You may have a slight edge on reaction time, trading efficiency, and information processing. If you are a hedge fund, you may have an even greater edge; however, being declared a hedge fund does not necessarily confer a lower efficiency level.
The old argument by Friedman on the efficiency of speculation is that reasonable speculation will drive out poor speculators and thus make the market efficient. The counterargument is that noise traders are more prevalent than shrewd speculators and can keep the markets inefficient. A corollary to the Friedman argument is that there are different classes of investors with varying levels of capital that can exploit opportunities, so while efficiency may exist on average, that is not the same as saying the markets are efficient for everyone.
A sophisticated investor has an edge and creates an opportunity to exploit inefficiencies. Hence, the job of any due diligence is to identify sophistication and the chance for the edge that can be exploited.
Wednesday, June 4, 2025
Stan Fischer - A great influencer on macroeconomics
Tuesday, June 3, 2025
Riding bubbles is a strategy - but more than one way to do it
Monday, June 2, 2025
Financial innovation is a virus!
"Financial innovation is like a virus, finding weaknesses in existing inventive schemes and regulations. When something is growing very fast, that suggests they have found a weakness." - Jeremy Stein Harvard University.
This is one way to think about financial innovation, but it is not very appealing. It argues that innovation is just an attempt to evade regulation. There is no doubt that some goals of innovation are evasion, but there are also other reasons, such as market efficiency. Nonetheless, one can argue that regulation reduces efficiency, and innovation attempts to address the problem. If the problem is corrected, there will be more growth in innovation. Securitization, derivatives, and ETFs are all significant innovations that make the markets more efficient, while also addressing regulatory concerns.
Knowledge and wisdom for picking your financial facts
"Knowledge is a process of picking up facts, wisdom lies in their simplification" - Martin H. Fischer
from story on Jane Street's traders:
Jane Street software engineer Ian Henry said the firm's traders all need "fighter pilot eyes" to deal with "extremely high information density" while making trading decisions. Henry said that, when making tools for these traders, he has to fine tune their size by a matter of pixels, in order for traders to maximize what's on the screen.
Henry says one of two main categories of applications built at Jane Street is focused on "managing traders' attention," ensuring they're alerted to interesting things amid that sea of information. He says the challenge for engineers is around "balancing noisiness" and stopping those tools from annoying traders with unnecessary information.
Is the problem for Jane Street the acquisition of knowledge or its simplification? I want more information because I never know what will be helpful, but then I have to be selective to focus my attention.
The trend trader will say that I focus my attention on only a limited number of issues—the trend in price. All other information is unimportant. The discretionary trader will argue that all information is essential, and I don't want to be constrained by limits on what I can review.
Where is the trade-off, and how much information is enough, is one of the key issues for any investor
Sunday, June 1, 2025
Bond and equity expectations are different
A recent paper by AQR, "Why are bond investors contrarian while equity investors extrapolate," makes an interesting observation. I have always thought that bond investors were mena reverting based on their conservative nature. There are limits to where yields can go. Equity investors are optimists, which means that returns can always move higher based on unlimited possibilities. Overoptimism will lead to the extrapolation of good news. Of course, this does not explain what happens to markets when they start to move negatively. The pessimism of bond investors forms beliefs about limitations and the notion that good news cannot last.
AQR states that the cause is information salience, the attention -grabbing qualities of certain information. This, however, does not focus on why there is salience that is different across markets and why it may persist. Nonetheless, it is essential to think about differences in how expectations are formed in major asset classes.
CBOE dispersion index mean reverting
The CBOE dispersion index, DSPX, measures the difference in volatility of individual stocks versus the volatility of the S&P 500 index. It peaked during the period of maximum trade uncertainty because the market could not determine the impact of trade tariffs on individual firms. Now that trade risk has declined, the DSPX has also declined, as the market now focuses on other factors that are more likely to impact all stocks. The key question now is whether we will have a recession.
Friday, May 23, 2025
Fama-French factors and economic drivers - Watch macro
The Fama-French factors have been used extensively to describe any set of returns; however, further work is needed to explain the economic drivers behind these factors. The paper "Understanding Asset Pricing Factors" takes a novel approach to analyzing the connection between economic events and factor moves. The authors analyze days with significant factor returns and then classify them by linking them to new articles the following day. Macroeconomic news, monetary policy, and corporate earnings reports are the main drivers of returns for factors, as should be expected.
The Fama-French factors include four major factors beyond market risk: SMB (small minus big size effect), HML (high minus low value effect), RMW (robust minus weak profitability effect), and CMA (conservative minus aggressive investment effect). It is found that HML value premium is related to the macro factor. CMA is related to the commodity factor. SMB is correlated with the exchange rate factor and the unknown factor. RMW is related to shocks in individual companies. The authors use AI and human coders to classify news events that were tied to the FF risk factors.
The categorization shows that humans and AI do a similar job and there is a clear distinction between the events that drive factor returns. Unsurprisingly, macro is the dominant driver of large moves. This resurrects the issue that even equity investors who may focus on factors RV should follow what is happening in the macroeconomy.
Trend-following returns during S&P 500 drawdowns are not all the same
Trend-follower dispersion in return performance
Thursday, May 22, 2025
Get your financial stylized facts right - The Bayesian foundation for empricial finance
Economists and financial professionals often use the term "stylized facts" as an alternative to a set of descriptive statistics or just data. Formally, a stylized fact can be a simplified representation or an empirical regularity that serves as the foundation for building theory. It may not be a simple piece of information, but a formal empirical regularity. In a recent paper, "International Financial Markets Through 150 Years: Evaluating Stylized Facts", the authors test a set of well-known stylized facts across a broad set of markets and a long time. This is the most exhaustive analysis of well-known stylized facts ever undertaken. We will not present all of the findings, but will show the summary table of what was tested.
Why is this so important? The stylized facts should be thought of as the Bayesian prior for any future analysis. Start with the stylized facts of what should appear in the data. You should not find something different, but you should argue that this is the basis for any future work. Before you pass judgment on a theory or set of data, look for the stylzied facts that already exist.
Tuesday, May 13, 2025
Co-occurrence versus correlation- Still learning about diversification
Evaluating trading strategies - Harder than you think
Unfortunately, life is more complicated. There is a distribution of Sharpe ratios across managers and over time, based on the strategy type and analysis used. If there is an average Sharpe for a strategy, then outliers on the high side may not be following the strategy named, or they may be subject to mean-reversion. The Sharpe ratio for any period may differ, so the last three years may not be representative of the manager's performance over the long run. There is a reversion to the mean when you sample the Sharpe ratio for a set of managers over a specific timeframe. Time and context matter.
If you look at enough managers, you will find some that are perceived to have an edge based on the sample data collected, yet this analysis may generate a false signal. For managers, you need to examine the sample set that has been analyzed. For quantitative strategies, you need to consider the backtesting performance and the length of time reviewed for the strategy. Again, sample size matters.
Sunday, May 11, 2025
Sharpe on thinking about risk
"If you're not thinking about risk, then you're not thinking." William Sharpe
"Portfolio management is risk management" is a mantra that I follow. Risk cannot be separated from return. If I can lower my risk, I can increase the Sharpe ratio without focusing on finding a better-returning asset. Of course, lowering risk will impact return. There is a cost to risk management. The secret is trying to manage the risk at a low cost. The critical component is portfolio construction because diversification is the only free lunch in finance.
A pet peeve of mine is that managers often discuss the return generation process before jumping to the risk management discussion. I understand that it is easier to separate the two, yet the link between return and risk is critical.
Saturday, May 10, 2025
Hofstadter's Law - applies to macro events
Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's Law. — Douglas Hofstadter
We have written about this, yet it keeps coming up in project management. It can also come up with crises. We may identify the key issues that may cause a crisis, yet it often takes longer to reach the actual event. What has been found with Hofstadter's Law is that while the median time to get a project done is usually within expectations, there are often very long tails beyond what is typically expected.
We know that uncertainty is high and impacts investment and consumer behavior. Still, the manifestation of this uncertainty may take months to show up in asset prices and actual data. Hence, identifying an event and seeing the impact of these expectations may not coincide. Being first when making a forecast is not the same as profiting from a forecast.
See The planning fallacy and Hofstadter's Law
Thursday, May 8, 2025
What is on risk radar for family offices?
Wednesday, May 7, 2025
Machine learinng and currency trading - still driven by momentum and carry
Business and financial cycles are different but an important indicator
A pivot to Europe requires an understanding of history
The uncertainty concerning US policy, as well as the hegemony of China, at odds with Western thinking, means there is a new interest and pivot to Europe. We are seeing the pivot to Europe in the stock returns for the year. This move is at the beginning of a change, but worth following closely.
One of the best books on the topic is Rethinking Europe's Future by David Calleo. It is not a book of Europe's future but a history of its past, as it tells how Europe got to its current state of a partial European state. While many consider Europe a third alternative to the current bipolar hegemony, it is still far from a finished political product. Europe is a state of mind, an ideal, but still not a reality. There is monetary policy integration and movement to some form of political and economic union. However, the idea of nation-states still burns in the heart of most Europeans. Citizens still identify as their country of origin and not as "European". The transition will still take time, and as of yet, has not ensured success. Europe is a work in progress, which means that economies of scale, common regulation, universal financing, and speaking with one voice for international affairs are still in the distant future.
We can be excited by a Europe of strong investment opportunities, but the chance to outshine the US equity markets will still take time. Investing in Europe is a good tactical trade, yet it may not yet be a strategic re-weight.