39000 GDX Jan20 20 puts went up in several blocks on the PHLX. 

Shares of Market Vectors Gold Miners (GDX) are up .09 to 21.84 today. GDX is near the middle of the 52 week range.

• Paper traded 39000 GDX Jan20 20 puts for .265. 
• The ADV is 177k contracts. 
• The OI is 114k contracts.

The volume went up in several blocks on the PHLX.This trade appears to be closing a recent large sale of the Jan20 20 puts in GDX.The big recent bounce is sufficient to close part of the position.Some of the opening prices were in the $1.75 area several weeks ago.

• IV 30 is trading 34%. 
• HV10 is trading for 21%. 
• IV 30 is above the HV 10.

The investment seeks to replicate as closely as possible, before fees and expenses, the price and yield performance of the NYSE Arca Gold Miners Index.