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Delta-Hedging of a European Call Options in Black-Scholes Under the Replicating Portfolio Strategy

Received: 30 October 2025     Accepted: 14 November 2025     Published: 17 December 2025
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Abstract

Investing money involves different levels of risks depending on the choice of the investment. In finance, an investor is faced with the problems of where and when to invest; ability to regularly and dynamically build his portfolio of investments; ability to find investment strategies that give profits with zero initial expenditures; proper risk management; option pricing; and many more. Delta-hedging, which involves trading financial instruments strategically, helps investors to eliminate or reduce risk associated with option trading. This can be achieved by continuous re-balancing the portfolio of the stock and option to always have after re-balancing, a total delta of zero. Practically, hedging is being done periodically. This work deals with the Delta-hedging of a European Call Options in Black-Scholes under the replicating portfolio strategy. This replicating portfolio contains stocks and money market accounts. We obtain the initial value required to build a trading strategy that produces exact payoff and has similar cash flow as that of the Call Option at any time which is the replicating portfolio. From there, we derive the delta of a European Call Option. The condition of the self-financing trading strategy is satisfied by the replicating strategy. Generally, the payoff from delta-hedging a European option depends on the stock path.

Published in Mathematics Letters (Volume 11, Issue 4)
DOI 10.11648/j.ml.20251104.11
Page(s) 71-76
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2025. Published by Science Publishing Group

Keywords

Delta Hedging, European Call Options, Black-Scholes Model, Replicating Portfolio, Trading Strategy

References
[1] Hardy, M. and Wirch, J. (2004). The Iterated Conditional Tail Expectation. North American Actuarial Journal 8: 62-75.
[2] Moghtadai, M. (2014). Partial Hedging of Equity Linked Products in the Presence of Policyholder Surrender using Risk Measures (Master’s Thesis), Concordia University, Montreal, QC.
[3] Moller, T. (1998). Risk-Minimizing Hedging Strategies for Unit Linked Life Insurance Contracts. ASTIN Bulletin, 28: 17-47.
[4] Moller, T. (2001a). Risk-Minimizing hedging Strategies for Insurance Payment Process. Journal of Finance and Stochastic, 5: 419-446.
[5] Moller, T. (2001b). Hedging Equity Linked Life Insurance Contracts. North American Actuarial Journal, 5: 79-95.
[6] Jaimungal, S. (2004). Pricing and Hedging Equity Indexed Annuities with Variance Gamma Deviates. Working paper, Department of Statistics, University of Toronto.
[7] Mackay, A. (2011). Pricing and Hedging Equity Linked Products under Stochastic Volatility Models. (Master’s Thesis) Concordia University, Montreal, QC.
[8] Black, F. and Scholes, M. (1973). The Pricing of Options and Corporate Liabilities. The Journal of Political Economy, 81(3): 637-654.
[9] Bernard, C. and Boyle, P. (2011). Natural Hedge of Volatility Risk in Equity Indexed Annuities. Annals of Actuarial Science, 5.
[10] Gaillardetz, P. and Lakhmiri, J. (2011). A New Premium Principle for Equity Indexed Annuities. The Journal of Risk and Insurance, 78: 245-265.
[11] Alev M. (2020). Comparison of various Risk measures for an Optimal Portfolio. Acta Universitatis Apulensis, 64: 83-115.
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  • APA Style

    Adindu-Dick, J. I. (2025). Delta-Hedging of a European Call Options in Black-Scholes Under the Replicating Portfolio Strategy. Mathematics Letters, 11(4), 71-76. https://doi.org/10.11648/j.ml.20251104.11

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    ACS Style

    Adindu-Dick, J. I. Delta-Hedging of a European Call Options in Black-Scholes Under the Replicating Portfolio Strategy. Math. Lett. 2025, 11(4), 71-76. doi: 10.11648/j.ml.20251104.11

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    AMA Style

    Adindu-Dick JI. Delta-Hedging of a European Call Options in Black-Scholes Under the Replicating Portfolio Strategy. Math Lett. 2025;11(4):71-76. doi: 10.11648/j.ml.20251104.11

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  • @article{10.11648/j.ml.20251104.11,
      author = {Joy Ijeoma Adindu-Dick},
      title = {Delta-Hedging of a European Call Options in Black-Scholes Under the Replicating Portfolio Strategy},
      journal = {Mathematics Letters},
      volume = {11},
      number = {4},
      pages = {71-76},
      doi = {10.11648/j.ml.20251104.11},
      url = {https://doi.org/10.11648/j.ml.20251104.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ml.20251104.11},
      abstract = {Investing money involves different levels of risks depending on the choice of the investment. In finance, an investor is faced with the problems of where and when to invest; ability to regularly and dynamically build his portfolio of investments; ability to find investment strategies that give profits with zero initial expenditures; proper risk management; option pricing; and many more. Delta-hedging, which involves trading financial instruments strategically, helps investors to eliminate or reduce risk associated with option trading. This can be achieved by continuous re-balancing the portfolio of the stock and option to always have after re-balancing, a total delta of zero. Practically, hedging is being done periodically. This work deals with the Delta-hedging of a European Call Options in Black-Scholes under the replicating portfolio strategy. This replicating portfolio contains stocks and money market accounts. We obtain the initial value required to build a trading strategy that produces exact payoff and has similar cash flow as that of the Call Option at any time which is the replicating portfolio. From there, we derive the delta of a European Call Option. The condition of the self-financing trading strategy is satisfied by the replicating strategy. Generally, the payoff from delta-hedging a European option depends on the stock path.},
     year = {2025}
    }
    

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    AB  - Investing money involves different levels of risks depending on the choice of the investment. In finance, an investor is faced with the problems of where and when to invest; ability to regularly and dynamically build his portfolio of investments; ability to find investment strategies that give profits with zero initial expenditures; proper risk management; option pricing; and many more. Delta-hedging, which involves trading financial instruments strategically, helps investors to eliminate or reduce risk associated with option trading. This can be achieved by continuous re-balancing the portfolio of the stock and option to always have after re-balancing, a total delta of zero. Practically, hedging is being done periodically. This work deals with the Delta-hedging of a European Call Options in Black-Scholes under the replicating portfolio strategy. This replicating portfolio contains stocks and money market accounts. We obtain the initial value required to build a trading strategy that produces exact payoff and has similar cash flow as that of the Call Option at any time which is the replicating portfolio. From there, we derive the delta of a European Call Option. The condition of the self-financing trading strategy is satisfied by the replicating strategy. Generally, the payoff from delta-hedging a European option depends on the stock path.
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