Buy-side asset managers are rapidly embracing artificial intelligence applications to price fixed income securities algorithmically in live trading execution environment or for purposes of end of day reconciliation and portfolio construction. The current fixed income capital market data flows are inefficient in many respects to enable robust coverage and precision for AI bond pricing. Markets remain heavily reliant on segregated and manual data operations between counterparties creating disparate data sets. These disparate data sets cause the market to suffer from information asymmetry and decentralization. As a result, insight from available data is fragmented and disseminated through manual exchanges between counterparties, which furthers the creation of disparate data sets.
Overbond performed detailed study of the current credit trading execution processes and how they could be improved with AI bond pricing model capability.
Two variations on how the buy-side trader initiates RFQ for a particular bond:
When the RFQ is initiated by the execution trader via the Bloomberg (or other) terminal or a phone call, there are 4 main methods of validating the pricing responses for pre-trade best execution purposes:
(depending on the RFQ responses received from electronic venues and/or over the phone)
The decision on which of these methods should be used to confirm best-execution, or whether the CBBT price is good would have to be taken by the execution trader on a case by case basis.
Execution Trader Workflow Objectives And Constraints:
The primary problem that the execution trader faces is due to the low confidence in prices suggested by Bloomberg CBBT and third-party applications that are currently used to validate best-execution pre-trade:
The price suggested by Bloomberg CBBT (and or other Bloomberg pricing sources) is a composite price based on the most relevant executable quotations on Bloomberg’s Fixed Income Trading platform. The composite is based on current market activity for that bond. If the bond is illiquid, for whatsoever reason, the CBBT price would not represent the true price. This is especially the case when dealing with high yield bonds or bonds with varying liquidity profiles.
The pricing methodology is based on a certain pre-defined methodology. The trader’s confidence in this system is low as the pricing methodology is not dynamic and this leads to the suggested pricing being incorrect. As perceived by the execution trader, there is a large difference in suggested price and accepted best price, 5-10 cents on average.
These factors lead to low confidence in the suggested prices and execution trading desks have hard time proving best execution to their clients based on the third-party impartial data feeds and pricing source.
AI Advantage over Statistical methods
COBI-Pricing, Overbond AI modeling techniques share many similarities with classic statistical modeling techniques starting from the fact that they both deal with volumus data. However, the key difference between statistical techniques and AI models Overbond applies is the goal of these approaches. While statisticians start with a set of known assumptions that are given to the model and best explain the expected behavior of the financial outcome in consideration, AI techniques rather aim at finding by themselves the method (with underlying assumptions that are unknown) that best predicts the outcome in consideration.
Overbond COBI-Pricing, AI bond pricing feed can price bonds automatically with live refresh rates measured in sub 5 second range enabling automated trading workflow. Models can price 30% more bonds with low liquidity profile greatly increasing coverage and pre-trade best execution capabilities. Price is assigned for each bond under the issuer company and spread or yield curve is constructed. COBI-Pricing can systematically price a large number of liquid and illiquid securities, issuer names, and identify pricing tension metrics across large coverage book systematically.
COBI-Pricing was created as part of Overbond’s suite of AI algorithms for the fixed income capital markets. It algorithmically finds the most optimal best-executable secondary market bond price for global IG issuers utilizing machine-learning (ML) algorithms. The ML algorithms analyze millions of data points related to factors such as historical pricing trends between similar bonds and similar issuers, intra-day pricing volatility, trading volume and counterparty composition, company fundamentals trend, investor sentiment, and industry, rating or tenor cluster comparables. Data is aggregated from multiple types of data sources including:
|Transactions data||Transactions occurring in the secondary market, and historical issuance spreads|
|Investment banking data||Fundamentals on corporations, their balance sheet indicators, proprietary data sets treasury groups of the corporations themselves had on file such as dealer quotations and trade points|
|Proprietary data||Client book data and/or direct access to large community of issuers and institutional investors via established feedback loops|
Overbond structured the implementation of the buy-side best execution pre-trade pricing engine implementation project in two phases. Overbond first deployed and tested end of day data on a smaller universe of ISINs to algorithmically find the most optimal best executable secondary market bond price for each bond utilizing machine-learning (ML) algorithms. As mentioned before, Overbond ML algorithms analyze millions of data points related to factors such as historical pricing trends between similar bonds and similar issuers, intra-day pricing volatility, trading volume and counterparty composition, company fundamentals trend, investor sentiment, and industry, rating or tenor cluster comparables. Data is aggregated from multiple types of data sources and models are computationally intensive. That is why intra-day pricing was approached as a Phase 2 deliverable of the project.
Front end interface developed to incorporate side by side visualization of the output of the finetuned and calibrated intra-day COBI pricing model
The diagram below and the following paragraphs provide a description of how the Overbond COBI-Pricing algorithm works.
The Overbond platform sources raw trading live date and fundamental data via Refinitiv’s live platforms. Our data sources include Refinitiv, S&P Global Market Intelligence (company level fundamental data) as well as various other sources. Overbond AI models have ability to incorporate dealer quotations/axes and investor preferences through direct feedback loops.
This raw data is then structured in the Overbond databases. Trading data and fundamental data are structured and mapped to the appropriate issuer ID. The data is systematically scrubbed for anomalies and null values. Finally, a set of key input factors are generated based on the raw input. These include but are not limited to factors that measure secondary market spread movements, recent issuance pricing levels, nearest neighbor credit ratings, and fundamental financial metrics. These factors are divided between sector and company-specific and are used as inputs to the machine learning models.
The subsequent stage for the machine learning algorithm is to train and apply several models to calculate the output pricing levels. An Ensemble Learning strategy is used in three phases, meaning multiple models are combined to elevate overall robustness at each training stage. These models are each trained using a subset of the past data, ranging from one day, one month to a maximum of ten years. Advanced sampling techniques were used to account for data gaps for illiquid issuers in order to construct yield curves for all tenors and all issuers in coverage universe.
Successful data pre-processing is the key stage and pre-requisite for the COBI-Pricing algorithm operation. The precision of the algorithm output is critically dependent on the accuracy, timeliness, and relevance of the pre-processed input data. Overbond sources raw data from major data suppliers in the financial sector, including Refinitiv, Ice, The Six Group, EDI, MarketAxess, Tradeweb, Euroclear, Clearstream, DTCC, CDS, S&P Global Market Intelligence, major credit rating agencies, as well as other sources. The data COBIPricing algorithms uses includes the following:
|Pre-processed Data||Source||Update Frequency||Relevance|
|Secondary market transactions data||Refinitiv, Ice, The Six Group, EDI, MarketAxess, Tradeweb||Intraday||Live prices and yields of companies’ bonds are used to measure spread movements in the coverage universe.|
|Settlement layer data per ISIN liquidity profile||Euroclear, Clearstream, DTCC, CDS||Intraday, end of day and historical||Settlement layer data when adjusted and merged with correct trading time stamp can augment the view into true liquidity of the particular ISIN as it contains settled trades by counterparties that were executed on the OTC level and otherwise do not appear in other consolidated data feeds.|
|Nearest Neighbour Credit per Rating and Industry Sector||Refinitiv, Ice, The Six Group, EDI, MarketAxess, Tradeweb, DBRS, Moody’s, Fitch, S&P||Weekly updates, quarterly filing cadence||Issuer’s industry sector cluster and past bond issuances and their ratings as well as composite rating for the issuer overall indicate the company’s risk level and benchmarking category. They are used to train the models and to backtest the accuracy of COBI-Pricing output.|
|Fundamental Financial Metrics||S&P Global Market Intelligence||Weekly updates, quarterly filing cadence||The company’s fundamental financial data is an indicator of the company’s credit-worthiness, and by extension, their cost of borrowing across tenors reflected in the bond pricing. In addition, fundamental metrics indicate the liquidity need of the company and its short term need to raise financing as well as leverage ratios. The financial profile of a company aids with clustering analysis of companies with similar characteristics.|
COBI-pricing is an advanced three-phase AI algorithm engineered to measure best-fit correlations with respect to company fundamental valuation and secondary market pricing for their bonds across sector peers and markets conditions at large. Models are tuned for different liquidity scenarios. A variety of preprocessed inputs flow into COBI-Pricing’s algorithm, to generate bond pricing output.
The first phase of the algorithm generates pricing curves for a list of companies specified by a domain expert with highest liquidity profile. This list contains companies from diversified sectors and are frequent issuers with liquid outstanding secondary market bonds (High Issuers). The Issuer should have a minimum number of bonds outstanding, bonds outstanding across the curve, and minimum number of trades and daily volume in secondary market for the algorithm to build a High Issuer curve using SVM algorithm.
The second phase uses a Nearest Neighbors algorithm to generate ISIN pricing curves for issuers with illiquid or insufficient secondaries (Low Issuers). Peers for each Low Issuer are identified using a score based on fundamental financial metrics, industry sector, credit ratings, secondary spreads, and issuances. The top High Issuer with the lowest blended score vis-à-vis a Low Issuer is classified as the peer. The secondary data from the top peer, along with the secondary data from the Low Issuer, is used to form an enhanced dataset for phase three to build curves.
The third phase creates pricing curves for all Low Issuers using Support Vector Regression models within SVM algorithm family, on the combined secondary data set of the Lower Issuer and the top peers as derived from the second phase.
COBI-Pricing handles the problem of sparse data sets, by filling the data gaps using credit matched peers with pricing levels to arrive at best fit or best executable prices for securities. Illiquid Companies with only minimal trading activity will now have modeled and relative-value prices for secondary market securities across all tenors. Their sparse data sets are enhanced with data from its peers, as determined in phase two of the algorithm.
COBI-Pricing AI output (data-feed) can be refreshed real-time or on an end of day basis depending on the user need. COBI-Pricing runs on the big-data set sourced from Overbond data lake. Overbond product team works with clients to customize coverage baskets based on trading style, models are then trained and back tested utilizing all data sources. The COBI-Pricing output can be integrated into a data feed via API, presented as custom visualization, or viewed on the Overbond Platform as downloadable table.
User Interface – Live Market Pricing:
COBI-Pricing AI output via data-feed, API access, can be also refreshed real-time or on an end of day basis depending on the user need. COBI-Pricing runs on the big-data set sourced from Overbond data lake. Overbond product team works with clients to customize coverage baskets based on portfolio strategy or trading style, models are then trained and back tested utilizing all data sources. The COBIPricing output can be integrated into a data feed via API, presented as custom visualization, or viewed on the Overbond Platform as downloadable table.
|Trade Time||Issuer||ISIN||Benchmark (bps)||Spread (bps)||Yield (bps)||Price|
|Trade Time||Issuer||ISIN||Benchmark (bps)||Spread (bps)||Yield (bps)||Price|
|2019-09-02 08:38||Vonovia SE||DE000A18V146||-54.52||54.10||-0.42||109.66|
|2019-09-02 09:51||Deutsche Bahn Finance GMBH||XS0969368934||-55.91||17.44||-38.47||111.73|
|2019-09-02 11:57||Carrefour SA||FR0013342128||-56.03||47.73||-8.29||103.39|
|2019-09-02 12:39||Deutsche Telecome AG||XS2024716099||-4.34||100.35||96.01||105.71|
|2019-09-02 12:41||Vonovia SE||DE000A1ZY989||-50.14||63.80||13.66||107.57|
|2019-09-02 12:48||Iberdrola SA||XS1575444622||-51.50||32.10||-19.40||106.32|
|2019-09-02 13:39||LANXESS AG||XS0855167523||-56.89||40.81||-16.08||109.00|
|2019-09-02 14:07||Electricite de France SA||FR0011637586||-57.37||29.82||-27.54||104.19|
|2019-09-02 14:17||Danone SA||FR0013216892||-56.69||18.16||-38.53||100.60|
|2019-09-02 15:07||LANXESS AG||XS1501363425||-57.58||35.62||-21.96||100.87|
|2019-09-02 15:18||Siemens AG||XS2049616464||-57.72||20.71||-37.01||100.75|
|2019-09-02 15:47||Telenor ASA||XS2001737324||-47.70||37.99||-9.71||105.52|
|2019-09-02 15:51||Electricite de France SA||FR0011637586||-57.50||29.98||-27.52||104.19|
|2019-09-02 16:01||Vonovia SE||DE000A19B4D4||-57.89||39.93||-17.96||102.24|
To establish that Overbond's COBI Bond Pricing algorithm deterministically constructs a fair value curve for a set of coverage issuers and can accurately price ISINs that are within the client’s coverage and with satisfactory precision and coverage. The set of coverage issuers and ISINs has been selected to represent diversified universe across issuers and ISINs with a liquid day-trading pattern, different ratings/risk profile, and bonds across curve. Back test description is per below.
1. Measure precision of the fair value curve output from the algorithm by comparing algorithm output prediction for a specific issuer and tenor with actual secondary levels with same specific issuer and tenor bond
2. Test timeframe is all trades that happened in designated 2 time periods as defined (1st Sep 2019 – 15th Oct 2019) and includes a total 500-800 ISINs
3. Test actual traded levels on the day as a most-relevant comparison to modeled level performance by measuring the difference and comparing on a relative value basis difference with average bid-ask spread for that name and tenor (aggregating all trades on the day for the same ISIN/CUSIP)
4. Use reference data from secondary trades in individual bonds selected as a comparison value to the corresponding modeled algorithm price. Do not compare algorithm output to the data-set that was used as algorithm input to preserve integrity in all test cases.
In order to test the yields suggested by COBI, back-test methodology has been defined with various metrics that would compare the prices/yields generated to various reference prices from legacy proprietary systems and/or Bloomberg data feeds. Prices suggested by COBI model should be within 10 cents of traded best price and ideally within traded best price and legacy system suggested price.
Following metrics are used for prices and i-spreads against Tradebook actual trades and quotes, Refinitiv/Bloomberg, received RFQ records and OMS executed trades:
The primary goal of the back test is to compare prices generated by the pricing engine that uses COBI yields as input and compare them to:
The expectation from trading execution desk is that prices based on COBI yields should effectively correct the automated system price:
i.e. Modeled price – Trader price < Automatic system price – Trader price
In order to visually compare prices, all prices are scaled using automatic system price and scored accordingly. As you can see in the sample graph below displaying results for 18 ISINs, in most cases COBI-Pricing level is within desired blue line range (BBG XYZ BID vs. BBG XYZ ASK), which is the category that indicates that COBI price is in line with traded price.
As we know, not all bonds fit perfectly on an issuer curve, some might be trading off the curve for a number of reasons, while employing a curve-builder approach to price ISINs in the secondary bond market we acknowledge that the model will not be precise for 100% for the entire bond universe. Hence, we segregated the bonds based on various measures including liquidity and volatility to identify bonds which can be priced accurately, and which bonds cannot be due to various market behavior, trading pattern and data availability limitations. COBI-Pricing model output price for each ISIN also has these explainability features attached to it:
Over the past couple of years, we have witnessed profound changes in the fixed income marketplace with counterparties increasingly adopting quantitative investing and liquidity risk monitoring techniques to automate their trading workflows. These include systematic algorithmic trading and liquidity risk management automation, merging of fundamental discretionary and quantitative investment styles, consumption of increasing amounts of alternative data, and adoption of new methods of pricing analysis for fixed income instruments such as AI analytics like Overbond COBI-Pricing algorithm.
Specific use cases for the COBI-Pricing algorithm application are examined to identify business objectives and key benefits below. Overbond client organizations include buy-side institutions with significant trading volumes and with over $2+ trillion of combined AUM. Their innovation groups actively explore new technologies that can serve as the catalyst for trading execution automation, pre-trade best execution, post-trade fixed income TCA, and custom AI analytics.
|AI Application||Business Objectives||Key Benefits|
|Intelligent automation and enhanced decision-making||
Overbond COBI- Pricing AI models aggregate historical data from multiple sources and optimize pricing for bonds with varying liquidity profiles. Overbond COBI Pricing can enhance users’ bond trading execution workflow by providing precise executable prices in up to 30% more situations when there is no directly observable trading price in the market.
COBI-Pricing enables fully automated bond trading execution workflow with various curve visualizations and front-end trade analytics tools that are natively integrated with trader’s desktop, OMS or other internal desk system via API data feeds.
As a buy-side trade execution desk, boost your best execution pretrade and post-trade TCA reporting with independent pricing feed, discover deep bond liquidity profile, and predict counterparty behaviour and where to route the RFQ request.
Buy-side credit and rates trades can automate their execution and pricing capabilities with precision and confidence.
Institutions considering AI predictive analytics implementation and big-data transformation projects, can employ acceleration utilizing externally calibrated models and market signals. Below are several key considerations and questions for executives in charge of AI roadmap:
Custom AI Services
Overbond works with clients to identify and recommend practical AI analytics use cases that are aligned with strategic goals of the financial institution. We help assess current-state AI capabilities, and define roadmap to help clients realise value from AI applications. We manage cross-channel data flows across multiple systems and enable custom font-end visualizations.
With our targeted approach and implementation methodology, we quickly demonstrate value of AI analytics to test use cases, enabling client-side change management approach and stakeholder buy-in.
We help clients build and deploy custom AI solutions to deliver proprietary analytics and tangible business outcomes. Our experience combines calibrated models, design patterns, engineering and data science best practices, that accelerate value and reduce implementation risk.
AI Analytics As-a-Service
Overbond helps customers design and oversee mechanisms to optimize and improve existing fixed income credit valuation, issuance and pricing prediction and pre-trade opportunity monitoring using AI. Our team of worldclass data scientists and engineers manage an iterative implementation approach from current state assessment to operational handover.
Overbond specializes in custom AI analytics development for clients implementing trade automation workflows, risk management, portfolio modeling and quantitative finance applications. Overbond supports financial institutions in the AI model development, implementation and validation stages as well as ongoing maintenance.
Vuk Magdelinic | CEO
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