Vistra Corp.

▲ Bull Case

• ◆PPA-driven re-rating + ERCOT structural lift: 3–4 incremental nuclear hyperscaler PPAs at $30–50/MWh premium combined with ERCOT prices lifting to $70–80/MWh could grow 2028E EBITDA to ~$10.5B (vs. base ~$8.2B), driving nuclear segment re-rating toward 18x multiples and implied fair value of $275–$310/share.
• ◆Vistra Vision crystallization: External capital raise or partial spinoff of the nuclear/renewables subsidiary at premium standalone valuation could surface hidden value not reflected in blended VST multiple; each $5B incremental external valuation adds ~$15/share.
• ◆Buyback acceleration: If FCF reaches $5B+ by 2027–28 with stable debt, management can accelerate buybacks to $2.5–3.0B/yr, collapsing share count to ~280M by 2030 and driving per-share FCF CAGR of 18–22%/yr independent of EBITDA growth.

▼ Bear Case

• ◆IRA nuclear PTC modification or repeal: Congressional budget cycle reduces PTC rate by 30–50%, causing direct EBITDA loss of $200–350M/yr combined with multiple compression as market loses confidence in the nuclear premium thesis; implied FV impact of −$30 to −$50/share.
• ◆ERCOT solar overcapacity caps power prices: West Texas solar pipeline (~60 GW) expands faster than data-center load materializes; battery storage arbitrages evening peaks; ERCOT prices stay at $40–46/MWh through 2028, pushing EBITDA $1.5–2.0B below base case and implied FV of $100–$130/share.
• ◆Weather tail event + leverage stress: Uri-scale winter freeze or summer grid emergency causes $1.5–2.0B EBITDA loss combined with hedge-gap exposure; added Lotus debt (+$1.9B) pushes Net Debt/EBITDA above 3.5x, triggering rating downgrade and buyback suspension; implied FV of $75–$110/share with downside acceleration in severe scenarios.

“The defining valuation debate is the VST-vs-CEG multiple gap. CEG trades at ~18.7x LTM EV/EBITDA as a nuclear pureplay; VST trades at ~9–10x as a blended business. Bulls argue this gap is unjustified because the same nuclear atoms earn the same PTC, hyperscalers do not discriminate, and SOTP analysis values VST's nuclear segment at 13–16x — closing the gap implies $200+/share. Bears argue the gap is structurally permanent because VST's nuclear is only ~20% of capacity vs. CEG's ~70%, blended businesses get blended multiples, and VST's higher leverage (~2.5–3.0x vs. CEG ~2.0x) caps the ceiling. This analysis sides modestly with the bulls — assigning a 12–14x multiple to the nuclear segment — but stops short of full CEG parity.”

• ◆Second major nuclear hyperscaler PPA announcement (Google/Amazon/Meta) — High probability (55–65%), +$10–25/share impact
• ◆ERCOT 2026 summer scarcity event or sustained $60+/MWh pricing — Medium probability (35–45%), +$5–15/share impact
• ◆FY2026 EBITDA guidance raise above $6.8B mid-point — Medium-High probability (45–55%), +$8–15/share impact
• ◆Vistra Vision external capital raise or partial spinoff — Low-Medium probability (25%), +$10–25/share impact
• ◆Nuclear plant life extension (NRC approval, 20-year extensions) — Medium probability (40%), +$5–15/share impact

• ◆IRA nuclear PTC modification or repeal — Low-Medium probability (20–25%), High severity; removes $400–500M/yr EBITDA and triggers multiple compression
• ◆ERCOT extreme weather (Uri-scale winter or summer grid failure) — Medium probability (15–25%), High severity; causes $1.5–2.0B EBITDA loss and potential hedge-book exposure
• ◆ERCOT solar overcapacity capping power prices — Medium-High probability (35–45%), Medium severity; structural offset to demand growth, caps ERCOT pricing uplift
• ◆Nuclear unplanned outage (multi-month) — Low-Medium probability (15–20%/yr/fleet), Medium-High severity; impacts PTC monetization and near-term cash flow
• ◆Leverage stress / rating downgrade — Low probability (10%), Medium severity; potential buyback suspension and increased cost of capital