A little late on this, the comments started on Sept. 30th and run through until Nov. 1st.
It seems like a keen focus is whether or not platinum and palladium futures should be regulated in the same manner that gold and silver is regulated. Platinum and palladium are much rarer than either gold or silver and the markets tend to be much thinner.
Here is an excerpt from the CFTC’s RFC page and the link to the page on CFTC’s site.
“Recently, the Commodity Futures Trading Commission (“Commission,” or “CFTC”) has been confronted with the question of how to treat certain transactions on fractional undivided interests, or shares, in single commodity investment products referred to as exchange traded funds (“ETF” or “ETFs”),\1\ primarily in the metals complex. The ETFs have in all relevant instances been structured as trusts (singularly, “ETF Trust” or “Trust”),\2\ the assets of which consist of holdings of one specific physical commodity.\3\ The explicit and sole investment objective of each of these ETF Trusts is to track as nearly as possible the spot price of the underlying physical commodity less the expenses of trust operations. The listing of these ETF shares provides shareholders with efficient exposure to commodity market price movements.\4\ These Precious Metal Commodity-Based ETF have primarily focused on holding either gold or silver, with a recent expansion into palladium and platinum.”