Two power stocks, similar weekly rebounds
Vistra and NRG both returned roughly 9–10% over the five sessions through October 12. That makes them an interesting pair from the watchlist. The resemblance fades when we look at the full drawdowns, cash statements and acquisition assumptions.
Both combine generation and retail energy operations. NRG also has Vivint's smart-home business. These are different portfolios, with hedging, financing and integration work between rising power demand and the cash that reaches shareholders.
The price recoveries are at different stages
VST closed October 12 at $158.13, up 9.14% over five sessions but down 2.07% that day. It was above its 20-, 50- and 200-session averages: $145.33, $144.10 and $154.72.
Within the latest 252 completed sessions, its highest close was $210.85 on October 15, 2025. The subsequent closing low of $134.71 on May 19 meant a 36.11% decline. The rebound to October 12 was 17.39%; VST remained 25.00% below that closing peak.
NRG closed at $106.37, up 9.89% over five sessions, with a 1.48% daily decline. It was above its 20-session average of $101.99, but below the 50-session $110.86 and 200-session $139.33 averages.
Its $184.03 February 24 closing peak was followed by a $95.23 October 2 closing low: a 48.25% decline. The rebound was 11.70%, leaving NRG 42.20% below the peak. A larger drawdown does not, by itself, establish a cheaper valuation. VST price cross-check · NRG price cross-check.
VST has the stronger position against these averages at this closing snapshot. NRG still needs to rebuild its intermediate trend. Keeping the October 12 regular close separate from any later pre-market quote avoids turning a dated chart into an implied live signal.
Start with cash that was actually reported
For the six months ended June 30, VST reported $2,222 million of operating cash flow and $1,572 million of capital spending, including nuclear fuel and LTSA prepayments. Subtracting the latter leaves $650 million. Vistra cash-flow tables.
NRG reported $948 million of operating cash flow and $655 million of capital spending, leaving $293 million on the same simple subtraction. It separately spent $7,101 million on acquisitions, net of cash acquired. That acquisition cash is not in the $293 million figure. NRG cash-flow tables.
These simple cash gaps exclude acquisitions and other investing or financing flows. They are not the companies' adjusted free-cash-flow measures. Nor do the larger absolute dollars establish a better investment: company size, working capital, debt and purchase price matter.
“Before growth” needs to stay in the label
Vistra's calendar 2026 range is $6,800–7,600 million of ongoing adjusted EBITDA and $3,925–4,725 million of ongoing adjusted free cash flow before growth. The outlook excludes Cogentrix and potential Meta PPA impacts. Its separate consolidated cash-flow range is lower; we use the ongoing range consistently here. August 7 guidance.
NRG's range is $5,325–5,825 million of adjusted EBITDA and $2,800–3,300 million of free cash flow before growth, including eleven months of LS Power portfolio ownership. Those different acquisition boundaries prevent treating the two ranges as a fully normalized comparison. August 4 guidance.
“Before growth” also means expansion spending still matters. It should not be presented as cash automatically available for repurchases or dividends after every project has been funded.
NRG forecasts $7.90–9.90 of adjusted basic EPS for calendar 2026. Its $106.37 close divided by the $8.90 midpoint is 11.95 times that company forecast. This is not a trailing P/E or dated analyst consensus. We do not pair it with a Vistra trailing multiple or a different forecast year to declare a valuation winner.
The insider records add a real difference
The July 13–October 12 window includes $1.17 million of purchases through James Burke's JAMEB, LP, across August 24, August 31 and September 1. Reported sales total $16.63 million; all six sale rows reference plans. Burke purchase filing.
NRG's eligible rows show $1.76 million of sales, with plans referenced in both sale rows, and no eligible purchase rows. These scans use non-derivative common equity and P/S codes. Grants and withholding codes are excluded. No purchase rows in this window is not proof that insiders never buy.
Buying is a distinct reported action worth examining. It still cannot tell us the future stock return. Plan-related sales should not be narrated as a sudden change of conviction. Use the Insider Analyzer to read the transactions and their filing context.
What would change the comparison?
For Vistra, holding the long-term average on later daily closes and delivering cash after growth spending would strengthen the recovery case. Losing that area would weaken the price evidence; disappointing cash conversion would weaken the financial evidence separately.
For NRG, reclaiming the 50-session average and holding a later retest would improve its intermediate chart. Integration progress needs to reach per-share earnings and cash after financing costs. A close below the October 2 low would weaken the recent rebound.
My present read favors Vistra's chart position and reported first-half cash generation. NRG's larger price decline creates a different question about integration and recovery, not an automatic bargain. A matched valuation comparison after debt, share counts and growth spending remains necessary before making an investment choice.
Explore the earnings calendar and other comparisons.
Method: October 12 completed regular closes; price returns exclude dividends. Highest close in the last 252 sessions followed by the lowest subsequent close defines each drawdown. Moving averages independently calculated. Financial statements cover H1 ended June 30; guidance is calendar 2026 management guidance, with different company definitions. Insider transaction dates July 13–October 12, filings checked October 13. Educational analysis, not a recommendation.