Every covered US stock index, with the state of the constituent list published for it. A list is published only once a tracking fund's filing reaches us whole, so constituentCount is 0 and asOfDate null while none is complete.

What happened to a requested ticker that no longer trades. "delisted": the company has no current US listing, so the answer is its history. "renamed": the company now trades as successorTicker, its current US presentation ticker (possibly another share class). A listed series (short volume, short interest, off-exchange volume, fails-to-deliver, congressional trades) is the retired ticker's own; a company-level read is the company's data.