Does downvote cause reputation changes here?

Question

I recently had a -1 reputation change for downvoting downvoted question

I wish to clarify two things:

1. What made my reputation(-1 reputation) change?

2. Does the downvote lead to reputation loss(as usually downvoting doesn't lose reputation on other stackexchange sites)?

Answer 1

1. Downvoting an answer causes -1 to the voter's rep (and -2 the poster).
2. Downvoting a question does not affect the voter's rep (but -2 to the poster).
3. Downvoting anything on Meta.Sec.SE does not affect anyone's rep, neither the poster nor the voter (and neither does upvoting).

This is exactly the same as on any other SE site. (except for Meta.SO, which has it's own rep separate from SO).