PSCE represents the energy segment of the S&P SmallCap 600, a market-cap-weighted index that consists of US small-cap companies screened for size, liquidity, and financial viability. The fund holds a concentrated portfolio of small-cap energy firms, which may include those involved in oil & gas exploration and production, refining, oil services, as well as pipelines. Selected securities are weighted by market cap and are constrained at each quarterly rebalance, such that individual securities will not exceed 22.5% weight and the aggregate weight of securities with over 4.5% allocation is capped at 45% weight of the portfolio. Overall, PSCE is an exclusive, small-cap play in the US energy sector.