The underlying STOXX International Equity Factor Index (USD) delivers a developed ex-U.S. large-/mid-cap portfolio selected from the STOXX Global 1800 ex USA using an Axioma optimizer to maximize a multifactor alpha signal—value (book/earnings/cash-flow yields, dividend yield), quality (profitability, accruals, dilution, NOA change, climate signals), momentum (price and earnings), low size (market cap), and low volatility (12-month return variance)—subject to diversification and risk controls. The optimizer constrains single-name active weights, sector and country active weights, tracking error and beta, and limits one-way turnover to maintain investability and capacity; a small minimum constituent weight avoids dust positions. The index inherits investability from the parent, including free-float and liquidity filters, and weights are the optimization outcome rather than simple scaling. Reviews and rebalances occur quarterly (March, June, September, December) in a rules-based process.

The underlying STOXX Europe Total Market Index offers free-float market-cap exposure to publicly traded Western European companies across large, mid, and small caps. Constituents are selected country-by-country to achieve at least 95% free-float coverage of each national investable universe, using a 93–99% buffer at reviews to reduce turnover; multiple share lines are aggregated at the company level. The index is weighted by free-float market cap with no stock, sector, or country caps, so concentration reflects market structure rather than index constraints. Reviews are quarterly (March, June, September, December), with corporate actions handled continuously per STOXX calculation standards; deleted names are not replaced between reviews, and qualifying spin-offs are added at the next review.

The underlying STOXX Emerging Markets Equity Factor Index targets diversified exposure to five style premia—quality, value, momentum, low size and low volatility—within the STOXX Emerging Markets universe. Securities are optimized to maximize a composite multifactor signal subject to portfolio constraints that control active country/sector exposures, predicted beta and tracking error versus the parent. Investability is enforced through tradability rules and a liquidity screen using 60-day median daily volume; suspended names’ weights are frozen. The optimizer applies single-name capping (≤10%) and an aggregate cap limiting the total weight of constituents above 5% to ≤40%, maintains portfolio breadth via an effective-number floor (≥30% of the parent’s), and avoids unintended bets by prohibiting negative exposure to any targeted factor and disallowing overweights in the worst 5% factor outliers. Turnover is limited to 12.5% one-way per rebalance; rebalanced quarterly in March, June, September and December.

The underlying SSGA US Small Cap Low Volatility Index offers a defensive small-cap portfolio from U.S. names ranked 1,001–3,000 by total market cap (NYSE/Nasdaq-listed; ≥50% free float; six-month average monthly volume ≥250,000 shares). Within 11 sectors, stocks are ordered by 60-month (or available history) monthly total-return volatility; the least-volatile names are selected until selected free-float market cap reaches 30% of each sector’s universe free-float market cap. Weights are proportional to 1/variance and normalized, then subjected to liquidity/implementability caps: 5% maximum per security and a limit of 20× a stock’s float-adjusted weight in the selection universe, with iterative pro-rata redistribution. The index rebalances annually, effective after the last business day of March (implemented at the first business day of April), aligning sector composition and weights to refreshed volatility ranks.

The underlying SSGA US Large Cap Low Volatility Index targets US large-cap common stocks from the largest 1,000 listed companies, excluding MLPs and BDCs, with ≥50% free float and ≥250,000 six-month average monthly share volume. At each annual March review (effective early April), securities are grouped into 11 sectors and ranked by 60-month monthly total-return volatility (shorter histories use available data or sector averages). Within each sector, the lowest-volatility names are added until selected free-float market cap reaches 30% of that sector. Constituents are weighted by the inverse of variance, then normalized, with iterative liquidity/capacity checks: single-name weights are capped at 5%, and any stock’s index weight is further limited to no more than 20× its float-adjusted weight in the eligible universe; excess weight is redistributed pro rata within sector.

The underlying S-Network Municipal Bond Closed-End Fund Index targets US-listed municipal bond closed-end funds across leveraged/unleveraged investment-grade and high-yield segments. Eligible funds must be US-organized, exchange-listed with last closing prices, and typically ≥100m USD market cap at entry (≥60m USD for existing CEFMX members), ≥500k USD three-month ADTV (≥250k USD for existing), management fees ≤1.25% for new and ≤1.5% for existing, and not trade at extreme relative premia/discounts (excludes new funds with ±20% and existing with ±25% versus peer average). Constituents are weighted by adjusted net assets using 90-day average premium/discount multipliers; single names are capped at 8%, and the aggregate of positions >5% is limited to 45%, with excess redistributed. The index rebalances quarterly on the last business day; membership is reconstituted semi-annually at March and September quarter-ends.

The underlying S&P Transportation Select Industry Index targets U.S. transportation equities from the S&P Total Market Index across GICS sub-industries such as airlines, air freight & logistics, rail, trucking, marine, and related services. Constituents must meet size/liquidity tests (typically ≥USD 500m float-adjusted market cap with float-adjusted liquidity ratio ≥90%, or ≥USD 400m with ≥150%); ongoing constituents are removed if market cap falls below USD 300m or liquidity ratio below 50%. The index seeks at least 35 names; if the primary sub-industries lack depth, highly correlated supplementary industries are used. It is reconstituted and rebalanced quarterly. Weighting is equal at each rebalance, then constrained by a “maximum basket liquidity weight” derived from 3-month median DTV versus a USD 500m theoretical portfolio value, with a final single-name cap of 4.5%; excess is redistributed pro rata.

The underlying S&P Telecom Select Industry Index delivers an equal-weighted basket of U.S. companies from the S&P Total Market Index classified in the primary telecom-related GICS sub-industries, then, if needed to reach 35 names, from highly correlated communications-equipment and alternative-carrier supplementary groups. New candidates must have float-adjusted market cap ≥USD 500 million with 12-month float-adjusted liquidity ratio ≥90%, or cap ≥USD 400 million with liquidity ratio ≥150%; existing members are dropped if cap falls below USD 300 million or liquidity below 50%. Each company is represented once via its most liquid share line and is assigned equal weight at the quarterly March, June, September and December rebalances, while 20% replacement buffers on supplementary stocks limit unnecessary deletions and help maintain industry breadth.

The underlying S&P Software & Services Select Industry Index targets U.S. companies from the S&P Total Market Index classified in Application Software, Systems Software, IT Consulting & Other Services, and Interactive Home Entertainment. Eligibility applies float-adjusted market cap and liquidity screens: new additions generally require ≥USD 500m float-adjusted market cap and a 12-month liquidity ratio (dollar value traded ÷ float-adjusted market cap) of ≥90% (stricter at USD 400–500m), while existing members must remain above 50%. The index uses a modified equal-weight scheme with a basket-liquidity cap and a hard single-name cap of 4.5% after iterative redistribution. Rebalances occur quarterly (March, June, September, December) using prices from the second Friday and take effect after the third Friday close; membership is reviewed at each rebalance with buffer rules to limit turnover.

The underlying S&P SmallCap 600 Value Index offers float-adjusted market-cap exposure to the value segment of the S&P SmallCap 600. The S&P 600 parent is committee-maintained with profitability and investability screens and typically admits new small-cap additions with total market caps around USD 1.2–8.0 billion; continued membership may fall outside these bands at committee discretion. Value classification is based on a composite of book-to-price, earnings-to-price, and sales-to-price. Each S&P 600 constituent receives style scores, and its float-adjusted market cap is proportionally allocated between value and growth; overlapping membership is permitted. Index weights equal the allocated float-adjusted market caps without single-name caps. Corporate actions flow through from the parent; style maintenance follows the standard S&P U.S. Style process with scheduled quarterly rebalances (March, June, September, December) using the latest fundamental data and buffers to limit turnover.