v3.25.1
Cover
May 06, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date May 06, 2025
Entity File Number 811-22039
Entity Registrant Name First Trust Specialty Finance and Financial Opportunities Fund
Entity Central Index Key 0001392994
Entity Tax Identification Number 06-1810845
Entity Incorporation, State or Country Code MA
Entity Address, Address Line One 120 East Liberty Drive
Entity Address, Address Line Two Suite 400
Entity Address, City or Town Wheaton
Entity Address, State or Province IL
Entity Address, Postal Zip Code 60187
City Area Code 630
Local Phone Number 765-8000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common stock, $0.01 par value per share
Trading Symbol FGB
Security Exchange Name NYSE
Entity Emerging Growth Company false