I used four brokerages in 2018 and when going over their 1099-B's I noticed that E-Trade is the only one that treats options on GLD as 1256 contracts. Gains and losses on those options, if they are reported on an E-Trade 1099-B, are therefore treated for tax purposes as 40% short term and 60% long term, possibly something to keep in mind if you trade lots of GLD options.