ETV R&D Expenses

Eaton Vance Corporation Eaton Vance Tax-Managed Buy-Write Opportunities Fund Common Shares of Beneficial Interest · R&D Expenses

ETV R&D Expenses

Latest reported$0.00period endingJun 30, 2026

ETV R&D Expenses ($0.00 → $0.00)

Annual R&D Expenses

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ETV r&d expenses history

Annual fiscal periods · USD. Dates are reporting period ends; fiscal years can differ from calendar years.

Eaton Vance Corporation Eaton Vance Tax-Managed Buy-Write Opportunities Fund Common Shares of Beneficial Interest R&D Expenses — Annual fiscal periods (USD)

Period ending	R&D Expenses (USD)
Dec 31, 2025	0
Dec 31, 2024	0
Dec 31, 2023	0
Dec 31, 2022	0
Dec 31, 2021	10
Dec 31, 2020	10
Dec 31, 2019	-5
Dec 31, 2018	0
Dec 31, 2017	0
Dec 31, 2016	0
Dec 31, 2015	0
Dec 31, 2014	0
Dec 31, 2013	0
Dec 31, 2012	0
Dec 31, 2011	0
Dec 31, 2010	0
Dec 31, 2009	0
Dec 31, 2008	0