Financial_Engineering_Presentation_v2

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Fifty Years of Black-Scholes and the Quant Revolution
Financial engineering: article review
Source: Siddhartha Pratim Chakrabarty, IIM Calcutta, December 2023
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About the source
I chose an article called "Fifty Years of Black-Scholes and the Quant Revolution: A Viewpoint". It was published in
December 2023 in a₹tha, a magazine of the Indian Institute of Management Calcutta. The text is six pages long,
much more than the 5,000 signs required.
The author, Siddhartha Pratim Chakrabarty, is a professor at the Indian Institute of Technology Guwahati. He works
on mathematical finance, risk management and algorithmic trading. I picked this text because it explains the main
tools of a financial engineer: pricing, hedging, portfolio theory and risk rules. It also shows where the profession is
going.
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1973: the turning point
In 1973 two important papers on option pricing appeared: one by Fischer Black and Myron Scholes, and one by
Robert Merton. People had studied option prices before, but Black and Scholes gave a clear and exact formula. With
it, the price of a European option could be calculated from information known on the first day of the contract.
This was more than just a formula. It gave finance a scientific way to price options, other derivatives, credit products
and even insurance. It also brought many mathematicians and physicists into banks and funds. They became known
as "quants", and the whole quant industry grew from this moment.
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How option pricing works
An option is a contract that gives its owner the right, but not the duty, to buy or sell an asset at a fixed price. A right
to buy is called a call option, and a right to sell is called a put option. If the owner can use the option at any time
before the end date, it is an American option. If it can be used only on the end date, it is a European option.
The seller of the option, called the writer, has a duty but no right. That is why the buyer pays a price in advance,
called the premium. The writer uses this money to build a replicating portfolio: a set of assets that is changed all the
time, so that it always matches what the writer may have to pay. This idea also led to risk-neutral probability, where
the option price is the expected payoff calculated in a special risk-neutral world.
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Portfolio theory and risk rules
Pricing goes together with portfolio theory. In 1952 Harry Markowitz explained that every investment has two main
sides: return and risk. Later, Sharpe, Lintner and Tobin built on his work and created the efficient frontier and the
Capital Asset Pricing Model, or CAPM. The Sharpe ratio is still widely used to measure how well a portfolio performs.
As banks moved from simple deposits and loans toward investment banking, they needed strong risk management.
The main rules come from the Basel regulations. At first they covered only credit risk, then market and operational
risk were added. After the 2008 crisis, rules about liquidity and leverage appeared. Basel III is in force today, and
Basel IV started in January 2023. By 2027 banks must hold at least 72.5% of the capital that the standard model
shows, even if their own models say less.
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Three trends for the future
The author names three areas that will shape the future. The first is high-frequency trading. Markets moved from
trading floors to electronic systems, and computers now send orders automatically using strategies such as pairs
trading, arbitrage and mean reversion. People still argue whether this makes markets more liquid.
The second is sustainable finance. Since the UN Principles for Responsible Investment in 2005, money managed with
ESG rules has grown to trillions of dollars. But rating firms such as MSCI use different factors, so ESG scores are not
always easy to compare.
The third is FinTech, which means using technology, data science and AI in financial services. Blockchain could make
slow cross-border payments easier. It also led to cryptocurrencies and central bank digital currencies, but privacy and
scalability are still open questions.
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Conclusion
To sum up, Black-Scholes made option pricing a precise science and started the quant industry. Portfolio theory and
the Basel rules help to measure and control risk. The quant industry has grown faster than most other sectors of the
economy.
The author says the new areas still face three problems. First, there are not enough trained people, because
education has not caught up. Second, companies adopt new tools slowly, because FinTech has many pain points and
sustainable finance has few clear standards. Third, governments are still working on common rules, especially for
climate risk.
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New terms and expressions
derivative: a contract whose value depends on an
underlying asset
call / put option: the right to buy / the right to sell at a
fixed price
premium: the price paid in advance for an option
writer: the seller of an option, who takes on the duty
replicating portfolio: assets that copy the payoff of an
option
risk-neutral probability: a measure used to price a
contingent claim
efficient frontier: portfolios with the best return for a
given risk
Sharpe ratio: extra return per unit of risk
hedge fund: a fund that uses derivatives, leverage and
short selling
algorithmic trading: automated trading done by
computer programs
limit order book: the list of buy and sell orders at an
exchange
ESG: environmental, social and governance criteria
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Summary of the source (handout)
The article "Fifty Years of Black-Scholes and the Quant Revolution: A Viewpoint" by Siddhartha Pratim Chakrabarty
(IIM Calcutta, December 2023) reviews how quantitative finance developed after 1973, when Black, Scholes and
Merton published their option-pricing work. An option gives its holder the right, but not the obligation, to buy (call)
or sell (put) an asset at a fixed price. Black and Scholes derived a closed-form formula for European options based on
a replicating portfolio, which led to risk-neutral probability. The author also covers Markowitz's portfolio theory, the
efficient frontier, CAPM and the Sharpe ratio, and shows how Basel regulations expanded from credit risk to market,
operational, liquidity and leverage risk after the 2008 crisis. In the second half, he names three current trends: highfrequency and algorithmic trading, sustainable finance with ESG scoring, and FinTech based on blockchain and digital
currencies. He concludes that these areas still face challenges in human resources, industry adoption and policy. For
a financial engineer, the text shows that pricing, risk management and innovation all rest on mathematical models,
and that the field keeps changing quickly.
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Sources
Chakrabarty, S. P. (2023). Fifty Years of Black-Scholes and the Quant Revolution: A Viewpoint. a₹tha, Indian Institute of Management
Calcutta, December 2023, pp. 14–19. https://www.iimcal.ac.in/FinLab/email-template8/pdf/Siddhartha-Pratim-Chakrabarty.pdf
Works cited in the article:
Black, F. and Scholes, M. (1973). The Pricing of Options and Corporate Liabilities. Journal of Political Economy, 81(3), 637–654.
Merton, R. (1973). Theory of Rational Option Pricing. Bell Journal of Economics and Management Science, 4(1), 141–183.
Markowitz, H. (1952). Portfolio Selection. The Journal of Finance, 7(1), 77–91.
Basel Committee on Banking Supervision. The Basel Framework. https://www.bis.org/basel_framework/
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