ISO / RTO · MODELED TAPE
PJMDEM98.4GWFCST104.2GW+5.8LMP$49.36CONG$11.6●RES15.8%●TX8●MIXSrc: · · Upd Oct 10, 2026MISODEM76.5GWFCST84.9GW+8.4LMP$39.82CONG$18.7●RES17.4%●TX10●MIXSrc: · · Upd Oct 10, 2026ERCOTDEM58.9GWFCST66.1GW+7.2LMP$41.20CONG$9.8●RES7.6%●TX12●MIXSrc: · · Upd Oct 10, 2026SPPDEM31.7GWFCST36.2GW+4.5LMP$33.15CONG$6.4●RES21.6%●TX5●MIXSrc: · · Upd Oct 10, 2026CAISODEM27.2GWFCST33.5GW+6.3LMP$63.20CONG$13.9●RES11.4%●TX7●MIXSrc: · · Upd Oct 10, 2026NYISODEM16.1GWFCST19.0GW+2.9LMP$68.40CONG$10.3●RES14.1%●TX4●MIXSrc: · · Upd Oct 10, 2026ISO-NEDEM12.8GWFCST15.4GW+2.6LMP$57.10CONG$7.9●RES17.2%●TX3●MIXSrc: · · Upd Oct 10, 2026PJMDEM98.4GWFCST104.2GW+5.8LMP$49.36CONG$11.6●RES15.8%●TX8●MIXSrc: · · Upd Oct 10, 2026MISODEM76.5GWFCST84.9GW+8.4LMP$39.82CONG$18.7●RES17.4%●TX10●MIXSrc: · · Upd Oct 10, 2026ERCOTDEM58.9GWFCST66.1GW+7.2LMP$41.20CONG$9.8●RES7.6%●TX12●MIXSrc: · · Upd Oct 10, 2026SPPDEM31.7GWFCST36.2GW+4.5LMP$33.15CONG$6.4●RES21.6%●TX5●MIXSrc: · · Upd Oct 10, 2026CAISODEM27.2GWFCST33.5GW+6.3LMP$63.20CONG$13.9●RES11.4%●TX7●MIXSrc: · · Upd Oct 10, 2026NYISODEM16.1GWFCST19.0GW+2.9LMP$68.40CONG$10.3●RES14.1%●TX4●MIXSrc: · · Upd Oct 10, 2026ISO-NEDEM12.8GWFCST15.4GW+2.6LMP$57.10CONG$7.9●RES17.2%●TX3●MIXSrc: · · Upd Oct 10, 2026
SMStock & Milster

Market Alert · 2026 · 7 MIN READ

MISO South: Reserve Margin Compression Brief

Capacity import constraints across the LA/MS/AR footprint are tightening on a horizon shorter than most planning models assume.

R. Stock

Managing Partner · Head of Infrastructure Intelligence

Previously: power & utilities advisory, top-three strategy consultancy

2026 · 7 min read

MISOReserve MarginIndustrialSouth

What changed

Recent PRA prints across MISO South zones reflect tighter conditions than headline reserve margins suggest, driven by sub-regional transfer limits and thermal retirement timing.

Implications

Industrial siting decisions in the South footprint should incorporate capacity exposure as a primary variable, not a residual one.

Reshoring announcements in Mississippi and Louisiana need explicit capacity strategy alongside incentive packaging.

Key Takeaways

  • 01Capacity is now a siting variable in MISO South, not just an operational one.
  • 02Industrial users should layer capacity exposure into the same model as incentives.

Discuss the implications for your platform.