The fund was the first mover in the ETFs space to offer exposure to cloud computing stocks. Its index takes all stocks that fall into any one of three groups per its definitions: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). The index applies additional size, liquidity, and tradability screens. The index assigns scores of 3, 2 and 1, respectively, to these groups. A stock can receive more than one assignment. A stocks weight in the index is its score divided by the sum of all scores, which is then modified so that no single security exceeds 4.5% weight. Firm size (market cap) has no direct bearing in weighting.