The MLP ETF space can add one more to its list, as the 12th fund made its debut on Friday. The iPath S&P MLP ETN (IMLP) hit the market and looks to compete with some of the biggest names in the space. The MLP sector has been one of the most talked about in recent years as paltry yields around the fixed income sector have led to investors finding their dividends in different places [for more MLP news and analysis subscribe to our free newsletter].