State Street SPDR Portfolio S&P 600 Small Cap ETF (SPSM US) – Portfolio Construction Methodology
Aug 6th, 2026 | By ETF Strategy AnalyticsThe underlying S&P SmallCap 600 Index offers committee-selected U.S. small caps, generally occupying the lower single-digit USD-billions market-cap segment, with explicit investability and profitability screens. At addition, unadjusted market cap must fall within S&P’s small-cap guidelines (e.g., around USD 1–6.7bn) and float-adjusted market cap must be ≥USD 500mn; public float must be ≥10%. Liquidity requires an annual dollar value traded to float-adjusted market cap ratio ≥0.75 and trading of at least 250,000 shares in each of the six months before evaluation. Constituents must have positive as-reported earnings in the most recent quarter and cumulatively over the prior four quarters; sector balance versus the relevant S&P Total Market Index size slice is considered. Weighting is free-float market-cap; rebalancing occurs quarterly in March, June, September, and December, with ongoing committee-driven maintenance for corporate events and additions/deletions.