Given the task definition and input, reply with output. In this task, a passage will be given and the goal is to generate a question about temporal relations based on that passage. A temporal relation describes the relation between two things with respect to time e.g., something happens/starts/terminates/... immediately/shortly/usually/... before/after/during/... something else.
Your question should include an event, or ask about an event, and should not be a yes/no question.

Passage: The steps come on the top of credit-tightening and tax measures introduced in May last year against excessive speculation in private property which have softened real-estate prices. Market speculation Friday sent property stocks reeling, with the Stock Exchange of Singapore Property Index ending down five percent -- the largest one-day fall since the May curbs.
What event has already finished?