The ETN has closed. The last day of trading was Aug 31, 2020. GSC closed for creations effective June 9, 2015. GSC is one of three ETPs that track a version of the S&P GSCI. Oddly, the ETN`s issuer doesn`t support a website with general information. Overall, there's little basis to recommend GSC aside from the fact that it tracks a modified version of the GSCI that aims to mitigate the negative impact of contango. The ETN is heavy on energy exposure and light on transparency. The discontinuation of creations can cause an imbalance of supply and demand, reflected in the ETN trading at a premium or discount.