Thinking niche has paid off for Market Vectors ETFs. A gaming ETF? They’ve got it. A global spin-off ETF? They have that, too. Jan van Eck, CEO of Van Eck Global, launched Market Vectors ETFs with 3 products in 2006. He tells IBD how his firm got to 60 ETFs holding a combined $22.86 billion in assets today (10th among ETF providers), as well as the outlook for various exchange traded fund strategies. IBD: What are your biggest achievements?