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Ziad / Health Sciences Imagine that your disease is going to kill you in less than a year, but a company develops a way to genetically engineer your own blood and your own immune cells to actually recognize the cancer and attack it. Instead of poisoning the cancer cells with toxic chemicals that wreak havoc on the immune system, you tweak the patient’s blood and let the body’s natural immune defense take care of the rest. After medical school in the UK, I worked as an emergency room doctor. What drew me to capital allocation in health sciences was the potential to help many people for years to come through investments that help fund medical innovation. My team and I often choose to invest at the very early stages of human trials, and sometimes when it’s just a concept. It’s exciting to see innovations shift from concept to reality. The human body is made up of proteins. Any disease caused by too much of a bad protein can be controlled or cured by blocking protein production at the cellular level. It’s a priority of mine to go out into the field so I can see firsthand if this is something real. Making the right investment decision is important not only for our investors but for mankind in general—because today’s treatment, which took years to develop, can have long-term future benefits for generations to come. Investing lets me use everything I’ve learned as a doctor, to help make a positive impact on the world. So that’s why I go beyond the numbers. Risks: All investments are subject to risks, including the possible loss of principal. Health Science stocks face special risks, including adverse legal or regulatory developments, patent expirations, market competition, and rapidly changing industry dynamics . Important Information This material is being furnished for general informational and/or marketing purposes only. 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Our emerging markets team has investment professionals from 26 nationalities speaking 28 languages.

Samy Muaddi

Head of Emerging Markets Fixed Income

Samy Muaddi is a portfolio manager in the International Fixed Income Division, focused on emerging markets.

Important Information

(All data as of 31 December 2022, unless otherwise noted. Firmwide assets under management include assets managed by T. Rowe Price Associates, Inc., and its investment advisory affiliates. All amounts shown in US dollars.)

¹Figure shown is as of March 31, 2024. Subject to adjustment.
²Top Asset Management Firms ranked by total AUM as of 31 March 2023, compiled by ADV Ratings (
Source: T. Rowe Price press release, April 2023.