Exchange-traded products are constantly evolving to provide exposure to new asset classes. But it's hard to see the value in some of the latest innovations. Take the GS Connect Exchange Traded Note ( GCE) -- if that is even the right name. The product, which tracks the Claymore CEF Index of closed-end funds, started trading Dec. 10, but until last week, there was no information about it on Claymore's Web site. Even now, I can't find the same name for the fund in any two locations.Unlike exchange-traded funds, which are baskets of stocks or other securities, exchange-traded notes don't hold anything. GCE shares simply represent a promise from Goldman Sachs ( GS) that investors will receive the same return as the closed-end fund index, minus expenses. I believe Goldman offers the investment strategy through an ETN because it would be difficult to create and redeem shares of an ETF that invested in closed-end funds, which can be very illiquid.