By: Russ Kamp, CEO, Ryan ALM, Inc.
I was participating on a panel at the Opal/LATEC conference yesterday. The moderator asked a question about the importance of process. In my response, I mentioned a number of process elements that are critical to the successful management of pension plans. Here is one point that I made that doesn’t get the attention that it deserves. Many, if not most, defined benefit pension plans have created an investment policy statement (IPS) that specifically restricts certain investments and their respective weights within the pension fund. The plan sponsor and their consultant likely allow investments in public equities and certain styles of equity management (i.e. value and growth, large and small cap, etc.). However, in many cases they restrict the exposure to any one security by an absolute amount such as 5%. This is the wrong approach.
Limiting exposures does reduce the risk that any one stock could have an outsized impact on the pension plan’s return, but by doing so, the plan sponsor is potentially negatively impacting the investment manager. Not all U.S. equity benchmarks are the same and treating them as such is potentially damaging to the manager and fund.
If a large cap growth manager has been retained and they are asked to manage a portfolio relative to the Russell 1000 Growth Index, limiting exposure in a stock to 5% would mean forcing that manager to make a negative bet against any stock in the index that has a weight greater than 5%. As of today, there are three stocks – Nvidia (12.9%), Apple (11.6%), and Microsoft (8.8%) – that the manager couldn’t own at benchmark weight, let alone own them above the index weight. This index is cap weighted, and as the stocks perform well their weight in the index grows. Not being able to own the stock at its index weight is harmful.
Worse, if the investment manager wants to make a positive bet on the stock, they can’t, forcing them to potentially choose weaker companies to round out their portfolio. When a manager is chosen, they are often picked because of their past track record of producing an excess return for a level of risk (tracking error). Restricting exposures to an absolute weight may render those previous return/risk characteristics moot. Furthermore, the exposure to a single stock should be relative to the weight in the index +/- band, which would be very dependent on the amount of tracking error that is comfortable to the plan sponsor.
For instance, a good information ratio (excess return/tracking error) is 0.33%. Meaning that for every 1% excess return, the manager is taking 3% tracking error. If the manager is hoping to add 2% above the benchmark over a cycle, that manager is going to have a tracking error close to 6%. The relative weight of a stock in a portfolio must reflect that level of potential tracking error. Higher tracking error portfolios need more flexibility. In this case, it would make sense to allow the manager to invest in Nvidia at the index weight +/- 2%. For lower risk strategies such as an enhanced index that only has 1% tracking error, perhaps the index weight +/- 0.5% would be appropriate.
Now, the Russell 1000 Growth Index is one of the more concentrated indexes with nearly 60% of the weight of the index in just the top 10 holdings, but it isn’t the only one. Currently, the S&P 500 has the same three stocks (Nvidia, Apple, and Microsoft) at weights greater than 5% and two others, Amazon and Alphabet, at weights >3%. If the manager wants to overweight a holding in the S&P 500 by +/- 2%, they would be restricted with a 5% absolute restriction and no ability to overweight.
I recommend that you review your IPS and make sure that your “risk control” objectives are not restricting your manager’s ability to produce an excess return. Remove any absolute constraint and replace it with a relative weighting based on the tracking error that the manager produces. Again, lower risk enhanced index managers will only need a +/- 0.5% to +/-1% restriction, while higher tracking managers will need greater flexibility.



