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Elham's Money View Blog Search For Stable Liquidity Providers Series

When it Comes to Market Liquidity, What if Private Dealing System is Not “The Only Game in Town” Anymore? (Part 1)

A Tribute to Value Investing

“Investors persist in trading despite their dismal long-run trading record partly because the argument seduces them that because prices are as likely to go up as down (or as likely to go down as up), trading based on purely random selection rules will produce neutral performance… Apparently, this idea is alluring; nonetheless, it is wrong. The key to understanding the fallacy is the market-maker.”


Jack Treynor (using Walter Bagehot as his Pseudonym) in The Only Game In Town.

By Elham Saeidinezhad

Value investing, or alternatively called “value-based dealing,” is suffering its worst run in at least two centuries. The COVID-19 pandemic intensified a decade of struggles for this popular strategy to buy cheap stocks in often unpopular enterprises and sell them when the stock price reverts to “fundamental value.” Such a statement might be a nuisance for the followers of the Capital Asset Pricing Model (CAPM). However, for liquidity whisperers, such as “Money Viewers,” such a development flags a structural shift in the financial market. In the capital market, the market structure is moving away from being a private dealing system towards becoming a public one. In this future, the Fed- a government agency- would be the market liquidity provider of the first resort, even in the absence of systemic risk. As soon as there is a security sell-off or a hike in the funding rate, it will be the Fed, rather than Berkshire Hathaway, who uses its balance sheet and increases monetary base to purchase cheap securities from the dealers and absorb the trade imbalances. The resulting expansion in the Fed’s balance sheet, and monetary liabilities, would also alter the money market. The excessive reserve floating around could transform the money market, and the payment system, from being a credit system into a money-centric one. In part 1, I lay out the theoretical reasons blinding CAPM disciples from envisioning such a brave new future. In part 2, I will explain why the value investors are singing their farewell song in the market.

Jack Treynor, initially under the pseudo name Walter Bagehot, developed a model to show that security dealers rely on value investing funds to provide continuous market liquidity. Security dealers are willing to supply market liquidity at any time because they expect value-based dealers’ support during a market sell-off or upon hitting their finance limit. A sell-off occurs when a large volume of securities are sold and absorbed in the balance sheet of security dealers in a short period of time. A finance limit is a situation when a security dealer’s access to funding liquidity is curtailed. In these circumstances, security dealers expect value investors to act as market liquidity providers of near last resort by purchasing dealers excess inventories. It is such interdependence that makes a private dealing system the pillar of market-liquidity provision.

In CAPM, however, such interconnectedness is neither required nor recognized. Instead, CAPM asserts that risk-return tradeoff determines asset prices. However, this seemingly pure intuition has generated actual confusion. The “type” of risk that produces return has been the subject of intense debates, even among the model’s founders. Sharpe and Schlaifer argued that the market risk (the covariance) is recognizably the essential insight of CAPM for stock pricing. They reasoned that all investors have the same information and the same risk preferences. As long as portfolios are diversified enough, there is no need to value security-specific risks as the market has already reached equilibrium. The prices are already the reflection of the assets’ fundamental value. For John Lintern, on the other hand, it was more natural to abstract from business cycle fluctuations (or market risk) and focused on firm-specific risk (the variance) instead. His stated rationale for doing so was to abstract from the noise introduced by speculation. The empirical evidence’s inconsistency on the equilibrium and acknowledging the speculators’ role was probably why Sharpe later shifted away from his equilibrium argument. In his latest works, Sharpe derived his asset pricing formula from the relationship between the return on individual security and the return on any efficient portfolio containing that security.

CAPM might be confused about the kind of risk that matters the most for asset pricing. But its punchline is clear- liquidity does not matter. The model’s central assumption is that all investors can borrow and lend at a risk-free rate, regardless of the amount borrowed or lent. In other words, liquidity provision is given, continuous, and free. By assuming free liquidity, CAPM disregards any “finance limit” for security dealers and downplays the importance of value investing, as a matter of logic. In the CAPM, security dealers have constant and free access to funding liquidity. Therefore, there is no need for value investors to backstop asset prices when dealers reach their finance limit, a situation that would never occur in CAPM’s world.

Jack Treynor and Fischer Black partnered to emphasize value-based dealers’ importance in asset pricing. In this area, both men continued to write for the Financial Analysts Journal (FAJ). Treynor, writing under the pseudonym Walter Bagehot, thinks about the economics of the dealer function in his “The Only Game in Town” paper, and Black responds with his visionary “Toward a Fully Automated Stock Exchange.” At the root of this lifelong dialogue lies a desire to clarify a dichotomy inside CAPM.

Fischer, despite his belief in CAPM, argued that the “noise,” a notion that market prices deviate from the fundamental value, is a reality that the CAPM, built on the market efficiency idea, should reconcile with. He offered a now-famous opinion that we should consider stock prices to be informative if they are between “one-half” and “twice” their fundamental values. Mathematician Benoit Mandelbrot supported such an observation. He showed that individual asset prices fluctuate more widely than a normal distribution. Mandelbrot used this finding, later known as the problem of “fat tails” or too many outliers, to call for “a radically new approach to the problem of price variation.”  

From Money View’s perspective, both the efficient market hypothesis and Manderbrot’s “fat tails” hypothesis capture parts of the data’s empirical characterization. CAPM, rooted in the efficient market hypothesis, captures the arbitrage trading, which is partially responsible for asset price changes. Similarly, fat tails, or fluctuations in asset prices, are just as permanent a feature of the data. In other words, in the world of Money View, arbitrage trading and constant deviations from fundamental value go together as a package and as a matter of theoretical logic. Arbitrageurs connect different markets and transfer market liquidity from one market to another. Simultaneously, despite what CAPM claims, their operation is not “risk-free” and exposes them to certain risks, including liquidity risk. As a result, when arbitrageurs face risks that are too great to ignore, they reduce their activities and generate trade imbalances in different markets.

Security dealers who are making markets in those securities are the entities that should absorb these trade imbalances in their balance sheets. At some point, if this process continues, their long position pushes them to their finance limit-a point at which it becomes too expensive for security dealers to finance their inventories. To compensate for the risk of reaching this point and deter potential sellers, dealers reduce their prices dramatically. This is what Mandelbrot called the “fat tails” hypothesis. At this point, dealers stop making the market unless value investors intervene to support the private dealing system by purchasing a large number of securities or block trades. In doing so, they become market liquidity providers of last resort. For decades, value-based dealers used their balance sheets and capital to purchase these securities at a discounted price. The idea was to hold them for a long time and sell them in the market when prices return to fundamental value. The problem is that the value investing business, which is the private dealing system’s pillar of stability, is collapsing. In recent decades, value-oriented stocks have underperformed growth stocks and the S&P 500.

The approach of favoring bargains — typically judged by comparing a stock price to the value of the firm’s assets — has a long history. But in the financial market, nothing lasts forever. In the equilibrium world, imagined by CAPM, any deviation from fundamental value must offer an opportunity for “risk-free” profit somewhere. It might be hard to exploit, but profit-seeking arbitrageurs will always be “able” and “willing” to do it as a matter of logic. Fisher Black-Jack Treynor dialogue, and their admission of dealers’ function, is a crucial step away from pure CAPM and reveals an important fallacy at the heart of this framework. Like any model based on the efficient market hypothesis, CAPM abstracts from liquidity risk that both dealers and arbitragers face.

Money View pushes this dialogue even further and asserts that at any moment, security prices depend on the dealers’ inventories and their daily access to funding liquidity, rather than security-specific risk or market risk. If Fischer Black was a futurist, Perry Mehrling, the founder of “Money View,” lives in the “present.” For Fischer Black, CAPM will become true in the “future,” and he decided to devote his life to realizing this ideal future. Perry Mehrling, on the other hand, considers the overnight funding liquidity that enables the private dealing system to provide continuous market liquidity as an ideal system already. As value investing is declining, Money View scholars should start reimagining the prospect of the market liquidity and asset pricing outside the sphere of the private dealing system even though, sadly, it is the future that neither Fischer nor Perry was looking forward to.

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Elham's Money View Blog Search For Stable Liquidity Providers Series

Can Algorithmic Market Makers Safely Replace FX Dealers as Liquidity Providers?

By Jack Krupinski
(This Money View piece is by my students, Jack Krupinski. Jack is currently a fourth-year student at UCLA, majoring in Mathematics/Economics with a minor in statistics.)

Financialization and electronification are long term economic trends and are here to stay. It’s essential to study how these trends will alter the world’s largest market—the foreign exchange (FX) market. In the past, electronification expanded access to the FX markets and diversified the demand side. Technological developments have recently started to change the FX market’s supply side, away from the traditional FX dealing banks towards principal trading firms (PTFs). Once the sole providers of liquidity in FX markets, dealers are facing increased competition from PTFs. These firms use algorithmic, high-frequency trading to leverage speed as a substitute for balance sheet capacity, which is traditionally used to determine FX dealers’ comparative advantage. Prime brokerage services were critical in allowing such non-banks to infiltrate the once impenetrable inter-dealer market. Paradoxically, traditional dealers were the very institutions that have offered prime brokerage services to PTFs, allowing them to use the dealers’ names and credit lines while accessing trading platforms. The rise of algorithmic market markers at the expense of small FX dealers is a potential threat to long-term stability in the FX market, as PTFs’ resilience to shocks is mostly untested. The PTFs presence in the market, and the resulting narrow spreads, could create an illusion of free liquidity during normal times. However, during a crisis, such an illusion will evaporate, and the lack of enough dealers in the market could increase the price of liquidity dramatically. 

In normal times, PTFs’ presence could create an “illusion of free liquidity” in the FX market. The increasing presence of algorithmic market makers would increase the supply of immediacy services (a feature of market liquidity) in the FX market and compress liquidity premia. Because liquidity providers must directly compete for market share on electronic trading platforms, the liquidity price would be compressed to near zero. This phenomenon manifests in a narrower inside spread when the market is stable.  The FX market’s electronification makes it artificially easier for buyers and sellers to search for the most attractive rates. Simultaneously, PFTs’ function makes market-making more competitive and reduces dealer profitability as liquidity providers. The inside spread represents the price that buyers and sellers of liquidity face, and it also serves as the dealers’ profit incentive to make markets. As a narrower inside spread makes every transaction less profitable for market makers, traditional dealers, especially the smaller ones, should either find new revenue sources or exit the market.

During a financial crisis, such as post-COVID-19 turmoil in the financial market, such developments can lead to extremely high and volatile prices. The increased role of PTFs in the FX market could push smaller dealers to exit the market. Reduced profitability forces traditional FX dealers to adopt a new business model, but small dealers are most likely unable to make the necessary changes to remain competitive. Because a narrower inside spread reduces dealers’ compensation for providing liquidity, their willingness to carry exchange rate risk has correspondingly declined. Additionally, the post-GFC regulatory reforms reduced the balance sheet capacity of dealers by requiring more capital buffers. Scarce balance sheet space has increased the opportunity cost of dealing. 

Further, narrower inside spreads and the increased cost of dealing have encouraged FX dealers to offer prime brokerage services to leveraged institutional investors. The goal is to generate new revenue streams through fixed fees. PTFs have used prime brokerage to access the inter-dealer market and compete against small and medium dealers as liquidity providers. Order flow internalization is another strategy that large dealers have used to increase profitability. Rather than immediately hedge FX exposures in the inter-dealer market, dealers can wait for offsetting order flow from their client bases to balance their inventories—an efficient method to reduce fixed transaction costs. However, greater internalization reinforces the concentration of dealing with just a few large banks, as smaller dealers do not have the order flow volume to internalize a comparable percentage of trades.

Algorithmic traders could also intensify the riskiness of the market for FX derivatives. Compared to the small FX dealers they are replacing, algorithmic market makers face greater risk from hedging markets and exposure to volatile currencies. According to Mehrling’s FX dealer model, matched book dealers primarily use the forward market to hedge their positions in spot or swap markets and mitigate exchange rate risk. On the other hand, PTFs concentrate more on market-making activity in forward markets and use a diverse array of asset classes to hedge these exposures. Hedging across asset classes introduces more correlation risk—the likelihood of loss from a disparity between the estimated and actual correlation between two assets—than a traditional forward contract hedge. Since the provision of market liquidity relies on dealers’ ability to hedge their currency risk exposures, greater correlation risk in hedging markets is a systemic threat to the FX market’s smooth functioning. Additionally, PTFs supply more liquidity in EME currency markets, which have traditionally been illiquid and volatile compared to the major currencies. In combination with greater risk from hedging across asset classes, exposure to volatile currencies increases the probability of an adverse shock disrupting FX markets.

While correlation risk and exposure to volatile currencies has increased, new FX market makers lack the safety buffers that help traditional FX dealers mitigate shocks. Because the PTF market-making model utilizes high transaction speed to replace balance sheet capacity, there is a little buffer to absorb losses in an adverse exchange rate movement. Hence, algorithmic market makers are even more inclined than traditional dealers to pursue a balanced inventory. Since market liquidity, particularly during times of significant imbalances in supply and demand, hinges on market-makers’ willingness and ability to take inventory risks, a lack of risk tolerance among PTFs harms market robustness. Moreover, the algorithms that govern PTF market-making tend to withdraw from markets altogether after aggressively offloading their positions in the face of uncertainty. This destabilizing feature of algorithmic trading catalyzed the 2010 Flash Crash in the stock market. Although the Flash Crash only lasted for 30 minutes, flighty algorithms’ tendency to prematurely withdraw liquidity has the potential to spur more enduring market dislocations.

The weakening inter-dealer market will compound any dislocations that may occur as a result of liquidity withdrawal by PTFs. When changing fundamentals drive one-sided order flow, dealers will not internalize trades, and they will have to mitigate their exposure in the inter-dealer FX market. Increased dealer concentration may reduce market-making capacity during these periods of stress, as inventory risks become more challenging to redistribute in a sparser inter-dealer market. During crisis times, the absence of small and medium dealers will disrupt the price discovery process. If dealers cannot appropriately price and transfer risks amongst themselves, then impaired market liquidity will persist and affect deficit agents’ ability to meet their FX liabilities.

For many years, the FX market’s foundation has been built upon a competitive and deep inter-dealer market. The current phase of electronification and financialization is pressuring this long-standing system. The inter-dealer market is declining in volume due to dealer consolidation and competition from non-bank liquidity providers. Because the new market makers lack the balance sheet capacity and regulatory constraints of traditional FX dealers, their behavior in crisis times is less predictable. Moreover, the rise of non-bank market makers like PTFs has come at the expense of small and medium-sized FX dealers. Such a development undermines the economics of dealers’ function and reduces dealers’ ability to normalize the market should algorithmic traders withdraw liquidity. As the FX market is further financialized and trading shifts to more volatile EME currencies, risks must be appropriately priced and transferred. The new market makers must be up to the task.

Jack Krupinski is currently a fourth-year student at UCLA, majoring in Mathematics/Economics with a minor in statistics. He pursues an actuarial associateship and has passed the first two actuarial exams (Probability and Financial Mathematics). Jack is working to develop a statistical understanding of risk, which can be applied in an actuarial and research role. Jack’s economic research interests involve using “Money View” and empirical methods to analyze international finance and monetary policy.

Jack is currently working as a research assistant for Professor Roger Farmer in the economics department at UCLA and serves as a TA for the rerun of Prof. Mehrling’s Money and Banking Course on the IVY2.0 platform. In the past, he has co-authored blog posts about central bank digital currency and FX derivatives markets with Professor Saeidinezhad. Jack hopes to attend graduate school after receiving his UCLA degree in Spring 2021. Jack is a member of the club tennis team at UCLA, and he worked as a tennis instructor for four years before assuming his current role as a research assistant. His other hobbies include hiking, kayaking, basketball, reading, and baking.