Q: I own TDB977 (US Blue Chip) and TDB645 (Science & Tech) which both had a very bad 2022. These really underperformed the rest of the market and I'm considering a change to an ETF for each category.

For TDB977, change to:
a) ZSP
b) TUED

For TDB645, change to:
a) ZQQ
b) TEC

Can I get your thoughts on the changes? Thanks.