SFERS staff lays out risk, liquidity and portable‑alpha plans; proposes tracking‑error guardrails

SFERS staff presented a wide‑ranging risk and leverage review that framed portfolio risk beyond short‑term volatility and asked the board to consider new monitoring and rebalancing guardrails.

Anna (head of risk monitoring) told commissioners the strategic asset allocation (SAA) approved by the board establishes an implied risk tolerance; staff’s work has focused on aligning the portfolio to that SAA by increasing liquidity (adding U.S. Treasuries, cash and public credit), modestly reducing downside risk, and lowering expected return volatility. Using Wilshire and other vendor analytics, staff reported a Wilshire liquidity base of about 44% and noted additional internal tiered measures that put Tier‑1 liquidity near the low‑forties percent range.

On measurement, staff proposed two new monitoring guardrails intended to isolate the portion of portfolio active risk staff can manage: an “actionable total‑portfolio tracking error” (designed to exclude illiquid allocations) with a suggested watch limit of 100 basis points, and a “stress total‑portfolio tracking error” (based on higher‑percentile volatilities and crisis correlations) with a suggested watch limit of 150 basis points. Staff said these metrics will be included in monthly rebalancing recommendations.

Leverage: the board approved a target total‑plan leverage of 3% with a 0–5% range; staff reported they have not used the full authority (average ~40 bps since inception; peak gross ~2.2% in Oct 2022). Given higher short‑term financing costs, staff said they are being judicious and are implementing portable‑alpha approaches that synthetically replicate beta exposures (via futures or repo) while using freed cash to seek diversifying alpha. Staff also described a custodial credit facility (BNY Mellon) used sparingly for short cash‑flow needs.

Stress testing and exposures: staff compared the plan’s modeled drawdowns to policy and peer benchmarks. They reported a 30% estimated loss in a 2008‑like global financial crisis replay and noted the plan’s tech tilt (particularly in private markets) makes it particularly sensitive to a tech‑meltdown scenario; staff said relative drawdowns versus a 70/30 public benchmark would generally be lower but absolute drawdowns in severe scenarios remain substantial.

Why it matters: SFERS manages a large, partially illiquid portfolio and staff presented concrete metrics and guardrails intended to operationalize the board’s SAA mandate and provide monthly, actionable measurement for rebalancing. Commissioners asked for additional clarity on guardrail derivation and implementation prior to relying on them for major policy decisions.

Next steps: staff will incorporate the proposed actionable and stress tracking‑error measures into rebalancing documentation, continue portable‑alpha implementation with risk controls, and return with follow‑up analytics at future committee meetings.