Are the underlying securities open during the ETP hours

for sale even though they could

Is this an ETF or an ETN?What is the index that the product is tracking? What are the index rules for inclusion,
Callaway X2 Hot Driver Sale, weighting, selection,
Ping G30 Irons Sale, etc?How is the product seeking to track this index? (Full replication, sampling/optimized)What does the product actually own (Equities,
Ping G30 Fairway Wood Sale, Bonds, SWAPS, Futures, etc)How many securities are in the portfolio?How are the securities weighted?How concentrated are the Top Ten holdings?When does the portfolio rebalance and how does the portfolio rebalance?Are the underlying securities open during the ETP hours? Are the underlying securities liquid, exchange traded with transparent pricing? As you can see,
TaylorMade R15 Driver Sale, many of the questions above are focused on the underlying holdings that comprise the product. The ETF is simply a wrapper. It an efficient delivery vehicle.