Improving Investment Returns Through Risk Management
It is often said that asset allocation is the most important source of performance. The statement is only true to a point. The impact of asset allocation, while profound, is only one variable among many. If anything, potential price changes of stocks within their market, or of equity markets relative to one another, are far greater than those of asset classes. Asset allocation decisions simply impact a much larger portion of any portfolio. The benefits of asset allocation alone are illustrated below. Featured is a single-market model, that allocates exposure weightings among cash, bonds and equities. As a deliberate provocation, performance of globally investing Swiss Pension funds is shown alongside the model. Readers should be aware that the model is geared not toward maximising returns (a task it is not equipped to achieve). Rather, the allocation’s sole focus is to avoid risk, whenever deemed appropriate. In the final analysis, risk and reward can’t be separated from one another. ‘Good risk’ will manifest in positive returns, and ‘poor risk’ translates into frequent. An asset that may be deemed reasonably safe today could morph into a high risk holding tomorrow. The model seeks to identify such changes and acts accordingly.
For the period 31.12.1999 to date, Exhibits 01 to 03 (below) give annualised rates of return for Swiss benchmark bonds, the Swiss equity market, and four allocation models that are driven by identical triggers and thus all act in sync with one another but have different allocation ceilings.
Compare the models return to those for Swiss pension funds (labelled PF Composite in most exhibits). Swiss pension funds have a legal obligation to invest in a manner suitable for ‘widows and orphans’ and should be keen to reduce risk without curtailing return potential. Unfortunately they also seem to have little or no confidence in their own assessments and dare not implement any conclusion of whatever analyses they may have performed. Instead, they stay close to, or outright replicate a token benchmark index, accepting all risk contained therein, be it high or low.
Three Choices, One Objective
After this initial impression, it is time to elaborate on how this illustration of a simple, yet effective risk-management works, that has been shown to generate superior returns in practice, and for all types of investment management clients.
Shown are four distinct domestic allocation models, investing in proxies for three asset classes:
All other possible investments are excluded (commodities, real estate, foreign currencies, etc.). The model is operated with a time frame that seeks to generate value over periods of nine to 18 months forward. It assumes that to be invested leads to a value increase, so the sole objective of the allocation is to contain risk.
Seen through the eyes of a globally investing Swiss pension fund, such a simple concept may appear poorly diversified. Perhaps it is. But the model serves as illustration for potential solutions that apply just as much on a global level. The domestic options here are not intended as the ‚holy grail’. Even so, the results are quite relevant to the domestic portion of Swiss pension funds, or to any other investor operating across quoted asset classes. Diversification is the means to an end and the name of that destination is value-added. Value may be added by reducing risk, and/or by increasing performance. Diversification should never be self-serving.
Each allocation model carries a designator that indicates maximum permitted equity exposure, in percent: D25, D50, D75 and D100.
The models are restricted to a ceiling in the equity weighting but there is no minimum exposure. Any changes are made on an all-or-nothing basis. The model’s investment choices are:
- CHF 1 Month LIBOR
- Synthetic 0% Swiss Federal Bond (10 Years)
- Swiss Equity Market (SPI)
To put results of the asset allocation into proper context, return data are shown for bonds and equities.
Obviously, one may argue that showing globally investing pension funds alongside this risk-management model is like comparing apples with oranges. Perhaps. But allocation is akin to choosing from a fruit-basket and thus the expectation would have to be that better choices could be made from a larger basket. If anything, the comparison is unfair to the domestic model, not vice versa.
Swiss pension funds do not appear to reap any benefits from the vast array of allocation options at their disposal. If through the inclusion of the data in my comparison this becomes transparent, then the much the better.
All time series have a base value of 100 as of 31.12.99.
Risk Probability As Sole Decision Criterion
Across all models, the same underlying mechanic is applied. All decisions to buy, hold, or dispose of assets are driven exclusively by the perceived probability of risk, as either
Acceptable refers to probability of gains being greater than for losses, critical assumes a higher probability for losses than for gains. No attempt whatsoever is made to quantify the magnitude of risk, or the magnitude of potential gains.
The default exposure of the models is to keep the maximum permitted exposure to equities, with the remainder held in bonds (fully invested position).
However, the asset mix is re-arranged whenever either bonds, or equities, show critical risk probability.
Then, proceeds from the disposal of equity exposure are invested into bonds, and from bonds into cash.
If bonds and equities are both found to have critical risk probability, then the allocation will keep 100% cash for as long as either, or both, risk probabilities return to acceptable status.
Exhibit 04 (above) gives ‘Observed Risk’, a proprietary metric developed by Agathos and used as part of the underlying methodology. Experience shows that observed risk is more sensitive as ex-post risk metric, and of superior utility, when compared to ‘volatility’.
Agathos D75 (a portfolio with up to 75% in equities) usually has risk very near that of government bonds (currently even less than this reference), risk for D100 is somewhat higher than for a bond portfolio but this higher risk is rewarded with substantially improved returns. All of that in the absence of any stock selection within the equity portion (which would improve performance further still).
The Chart in Exhibit 05 (below) illustrates the resulting value when subtracting observed risk from nominal return.
Allocation Mirrors Investment Methodology
Using a mechanical decision making process to illustrate should not be construed as recommendation, or endorsement of mechanical decision making. On the contrary: I am a sworn sceptic of any algorithm-based investing. It is ultimately self-defeating and I view the current volume of algorithm-based trading & investing in financial markets as a ticking time bomb.
When illustrating the importance of applying judgement mechanical simulations are a necessary evil. Without them, no retrospective calculations would produce acceptable evidence. Only a strict mechanism adds the required amount of retro-active objectivity.
The risk assessment used in the models is not the result of some statistical fishing expedition that eventually settles for the most successful test.
Rather, the mechanism behind the illustration is based on methods of consideration that I have long used as global portfolio manager when taking investment decisions. These were equally valuable when assessing the investment outlook for all quoted investments (asset allocation across asset classes, national markets, and for stock selection around the globe).
If investment performance is expected to consistently be something other than the product of chance, then investment decisions, at any conceivable and permitted level must be based on a specific, and intelligently rather mechanically deployed methodology of sorts. There are numerous perfectly legitimate methodological concepts in existence, all of them have strengths and weaknesses. These materialise under specific circumstances and must be understood fully if they are to function reasonably well at all times.
Excess Returns From Risk Reduction
Table 2 in Exhibit 06 (below) shows some easy-to-understand data summarising monthly rates of return across the full history. In addition, the popular metric ‘volatility’ is shown, together with the magnitude of horizontal distortion of the allegedly ‘normal’ distribution. The larger this distortion, the more misleading ‘volatility” is. Compare sums of gains and losses, and the ratios of these sums, to better grasp how a sound risk assessment impacts overall performance.
In Exhibit 07 (above), Chart-5 shows return and risk relative to equities (set to 1.0). All Agathos models exceed returns from the equity market, but with a fraction of the equity market’s risk. Even ‘Agathos D25’ which is constrained to a maximum exposure of 25% in equities outperforms the equity index! Agathos D100, in effect the proxy for a common sense equity-investor, clearly out-smarts the market index by virtue of timing alone.
Chart-6 in Exhibit 08 (below) makes the same comparisons with Swiss Federal Bonds, probably the more relevant yardstick. Only Agathos D100 has risk notably in excess of bond risk, but that risk is compensated for by earning more than twice the bond return.
Relative Immunity Against Market Declines
In Exhibit 09 (below), Table 03 shows a regression analysis of all Agathos allocation models against the Swiss equity market. Given the dynamic asset allocation, it is only natural and intended that R-squared is extremely low. Statistically speaking, that gives any predictions made with the regression formula a low degree of reliability. Low R-squared readings identify the methodology as source of performance, as it should be. The allocation is not driven by what happens in markets, it is driven by the considered decision to part take in the market, (in this case a mechanical approximation of such judgement). That ‘judgement’, while crude and far from perfect, shows itself superior to ‘chance’, or the return data would not be as shown. As such, it exposes the failure of pension fund management, which ignores risk entirely, in favour of outright lethargy. The lower R-squared, the greater that portion of returns attributable to managerial judgement.
Investment performance can and should be measured by statistical means quantitatively, and qualitatively. But to generate that performance suitable to any given mandate is not a statistical process but one that involves assessment of potential future developments in asset prices.
Table-04 in Exhibit 10 (above) compares a number of conceivable benchmarks (with equity weightings from 25% to 100%) to the matching dynamic allocation model. When fully invested, the dynamic allocation can only perform exactly as it’s corresponding benchmark.
Thus, all improvement, either on returns, and/or risk is fully attributable to risk reduction, achieved by temporarily eliminating exposure to any asset class deemed to have critical risk, except for ‘cash’.
Chart-06 vividly illustrates the overall benefits of risk management, placing the risk and return pairings of the four allocation models in a scatter diagram, with normalised risk shown horizontally, and normalised return vertically.
For the sake of comparison, directly relevant benchmarks are included that have equity exposure corresponding the ceiling in each model.
Also shown are returns for CHF-1 Month Libor, 10-year Swiss Federal Government Bonds, and the Swiss Performance Index (representing a pure, always fully invested equity portfolio). Actual Swiss pension fund data is included too.