ETNs are different than their ETF cousins, but what are they exactly? There are thousands of ETFs, or exchange-traded funds, in the modern investing environment. But what is an ETN, and how is this product similar or different from an ETF?An ETF is a type of investment fund that makes sense when you unpack the first three words of the acronym. It's "exchange traded," meaning it gets prices printed across the trading day like your favorite blue chip stocks. But it's also a "fund," meaning it is a