latamen
Innovation is a crucial way to strengthen our quant offering

Innovation is a crucial way to strengthen our quant offering

25-11-2019 | Insight
Is the emergence of alternative data and artificial intelligence a game changer for quant investors? Or just a natural extension?
  • Weili  Zhou
    Weili
    Zhou
    Head of Quant Equity Research
  • Wouter Tilgenkamp
    Wouter
    Tilgenkamp
    Trading developer
  • Thom Marchesini
    Thom
    Marchesini
    Researcher
  • Bastiaan  van Gaalen
    Bastiaan
    van Gaalen
    Quant Selection Research

Speed read

  • Robeco invests considerable resources in innovative technologies
  • Alternative data can enhance conventional investment signals
  • AI and automation make our research much more scalable

For over two decades, Robeco researchers have been at the frontier of quantitative investing. They were among the first to document factor premiums in emerging markets; to report a worldwide low-risk anomaly; to fully integrate ESG into quant portfolios; and to exploit factors in corporate bond markets. In recent years, we also invested considerable resources in innovative technologies, leading to concrete advances in the integration of alternative data, artificial intelligence (AI) and cloud computing into the investment process. We talked with four researchers that have been involved in the latest developments in these areas.

Stay informed on Quant investing with monthly mail updates
Stay informed on Quant investing with monthly mail updates
Subscribe

Given the rise of big or alternative data and AI, do you think the drivers behind most of our existing quantitative strategies are at risk becoming obsolete?

Weili Zhou: “Not in the foreseeable future. True, the industry has seen massive amounts of money flowing into factor-based strategies. Also, the performance of some factors could be under pressure for some time. People often present these two arguments to advocate for alternative signals and strategies, with the concern that “traditional” factors may be overcrowded. ”

“But, as active managers, we see this more as an opportunity than a threat. We think crowding issues have more to do with the way factors are implemented in generic strategies. These often mean following the simple textbook definition of factors, investing in transparent public indices, or implementing trades on a few days in the year.”

“Top-notch strategies require continuous enhancement of signals, optimization processes, and execution. And innovation is a crucial way to strengthen our offering and to bring scalability to our business. Here, we don’t mean that machines can fully replace humans in research. But, under human supervision, machines can help detect or even explain new patterns that are often non-linear.”

“Machines can also make research production much more scalable. Thanks to AI and automation, what could be done in a day, may be done in an hour all this explains why Robeco is investing so heavily in these areas. This is really a broad-based effort, involving many more people than just the researchers within the company.”

Could you give us an example of alternative data used in the investment process?

Thom Marchesini: “We currently use several alternative data sources in our investment process. For example, we use a news sentiment signal based on aggregated information of media text analytics. This signal recommends our stock-selection model to buy stocks that have been positively mentioned in news articles, and sell stocks that have had a less positive coverage in the media.”

Before including new signals, we always take a critical look first

“But before including these signals, we always take a critical look first. In the news sentiment example, we noticed that the naïve aggregation of news sentiment leads to undesired biases. Companies that are positively mentioned in the news tend to be larger and more expensive stocks. After correcting for these exposures, we concluded that the news sentiment signal is a diversifying addition to our momentum strategies, in both developed and emerging markets.”

What is your main takeaway from working with this kind of alternative data?

Thom Marchesini: “There are numerous alternative data providers and it is virtually impossible to evaluate them all. So, it is up to us to separate the wheat from the chaff. In that process, we stick to our investment philosophy: evidence, rationale, and prudence. We will not include new data sources into our investment decision process based only on beliefs. The source has to be backed by strong empirical evidence and sound economic rationale. If we find that it does not meet our standards, we will refrain from using it.”

Next to the signal enhancement, a big step has also been taken in optimization, the process of translating signals into portfolio holdings. Could you explain further?

Bastiaan van Gaalen: “Robeco has developed and enhanced its proprietary optimization algorithm to achieve the highest net performance. The algorithm runs based on hundreds of parameters, each of which has a different impact on the outcome. Normally, when we develop a new strategy or customize a solution, parameters are re-evaluated and adjusted.”

“In the past, we did this in a heuristic way, based on in-house experience. But thanks to the large increase in customization requests and our own ambitions in terms of innovation, we have started to introduce some clever machine learning algorithms to facilitate the search for optimal settings. In this large algorithm design space, it is not desirable to do a grid search due to the curse of dimensionality.”

“Therefore, we took inspiration from the latest developments in parameter tuning for machine learning algorithms, in other words Bayesian and evolutionary guided searches, that naturally converge to a solution based on previous results. We eventually settled for one that was the best in avoiding local optima.”

AI is competing with our most experienced researchers and is now part of our standard backtests

“We have tested this technique in a controlled environment, for example, for a customization with strict ESG constraints, for which you need to loosen certain constraints to be able to come to feasible solutions. AI is actually competing with our most experienced researchers and is now part of our standard backtests.”

One last yet crucial step in the quant investing value chain is execution. This is also where we differentiate ourselves from traditional ways of factor investing. Could you fill us in on our current practice?

Wouter Tilgenkamp: “Many academic papers use monthly rebalancing of portfolios to test the existence of factor premiums. This is still common practice in the asset management world But equity markets are open every week, five days a week. So, if we kept trading once a month only, we would cut ourselves short in finding the best opportunities.”

“This is why we’ve enhanced the investment process by scouting markets throughout every trading day for opportunities in stocks we deem attractive to buy or sell. More recently, we completed the implementation of so-called wish lists algorithmically. These are lists of stocks which we can trade when an opportunity pops up at any point of the day.”

“To do this in an efficient manner for hundreds of quant equity accounts, we needed scalability. Project ‘Obelix’ (Opportunistic Block Liquidity Xapture) was launched to continuously look for favorable block trades, with little market impact. This opportunity-searching algorithm now runs on the Cloud and we have seen a rapid increase in the amount of trades being executed, resulting in substantial savings for our clients.”

Logo

Important information

The Robeco Capital Growth Funds have not been registered under the United States Investment Company Act of 1940, as amended, nor or the United States Securities Act of 1933, as amended. None of the shares may be offered or sold, directly or indirectly in the United States or to any U.S. Person (within the meaning of Regulation S promulgated under the Securities Act of 1933, as amended (the “Securities Act”)). Furthermore, Robeco Institutional Asset Management B.V. (Robeco) does not provide investment advisory services, or hold itself out as providing investment advisory services, in the United States or to any U.S. Person (within the meaning of Regulation S promulgated under the Securities Act).

This website is intended for use only by non-U.S. Persons outside of the United States (within the meaning of Regulation S promulgated under the Securities Act who are professional investors, or professional fiduciaries representing such non-U.S. Person investors. By clicking “I Agree” on our website disclaimer and accessing the information on this website, including any subdomain thereof, you are certifying and agreeing to the following: (i) you have read, understood and agree to this disclaimer, (ii) you have informed yourself of any applicable legal restrictions and represent that by accessing the information contained on this website, you are not in violation of, and will not be causing Robeco or any of its affiliated entities or issuers to violate, any applicable laws and, as a result, you are legally authorized to access such information on behalf of yourself and any underlying investment advisory client, (iii) you understand and acknowledge that certain information presented herein relates to securities that have not been registered under the Securities Act, and may be offered or sold only outside the United States and only to, or for the account or benefit of, non-U.S. Persons (within the meaning of Regulation S under the Securities Act), (iv) you are, or are a discretionary investment adviser representing, a non-U.S. Person (within the meaning of Regulation S under the Securities Act) located outside of the United States and (v) you are, or are a discretionary investment adviser representing, a professional non-retail investor. Access to this website has been limited so that it shall not constitute directed selling efforts (as defined in Regulation S under the Securities Act) in the United States and so that it shall not be deemed to constitute Robeco holding itself out generally to the public in the U.S. as an investment adviser. Nothing contained herein constitutes an offer to sell securities or solicitation of an offer to purchase any securities in any jurisdiction. We reserve the right to deny access to any visitor, including, but not limited to, those visitors with IP addresses residing in the United States.

This website has been carefully prepared by Robeco. The information contained in this publication is based upon sources of information believed to be reliable. Robeco is not answerable for the accuracy or completeness of the facts, opinions, expectations and results referred to therein. Whilst every care has been taken in the preparation of this website, we do not accept any responsibility for damage of any kind resulting from incorrect or incomplete information. This website is subject to change without notice. The value of the investments may fluctuate. Past performance is no guarantee of future results. If the currency in which the past performance is displayed differs from the currency of the country in which you reside, then you should be aware that due to exchange rate fluctuations the performance shown may increase or decrease if converted into your local currency. For investment professional use only. Not for use by the general public.

I Disagree