77 A fund manager uses an ETF to make a tactical adjustment to her existing portfolio, focusing on a specific area of technology. The manager has identified three ETFs as potential investments:

ETF type	ETF 1 (Thematic)	ETF 2 (Broad-based)	ETF 3 (Thematic)
Ratio of average dollar trading volume to average assets	3.5	12.1	7.5
Annual management fee (basis points)	12	10	20

Which ETF would be most suitable for the tactical adjustment to the portfolio?