Stock Movers
Stock Movers

Aug 14, 2026 · 6 min

SanDisk and Reddit surge while York Space Systems cuts guidance

Sandisk Gains, Reddit Jumps, York Space Systems Sinks on FY Revenue Guidance Cut

Understanding the specific catalysts behind daily stock movements helps investors separate short-term market noise from long-term corporate trends.

3 key takeaways
  1. 1SanDisk is rallying on an overweight rating from JPMorgan as NAND flash memory demand continues to climb.
  2. 2Reddit shares jumped following the announcement that the social platform will join the prestigious S&P 500 index.
  3. 3York Space Systems faced a sharp selloff after lowering its full-year revenue outlook.

Don't miss

Matt Griffin breaks down how Reddit's addition to the S&P 500 index creates mandatory buying pressure from institutional index funds.

The brief

SanDisk is seeing a major stock surge following a positive rating upgrade from JPMorgan, driven by the rapidly growing demand for NAND flash memory in consumer electronics and enterprise storage solutions.

Meanwhile, Reddit has secured a major valuation boost after its inclusion in the S&P 500 index, a milestone that forces index-tracking funds to buy its shares and cements its status in the broader market.

On the downside, aerospace manufacturer York Space Systems saw its stock plummet after management slashed its full-year revenue guidance, raising concerns about supply chains and defense contract timelines.

What was said on this episode

5 statements · 2 positive · 1 negative · 1 mixed · 1 neutral

  1. JP Morgan expects the NAND flash-memory market to reach $500 billion next year.

    “They expect a $500 billion market for that technology next year.”

    Listen at 1:55

  2. The NAND flash-memory market was $70 billion last year.

    “That's up from just 70 billion last year.”

    Listen at 2:00

  3. Matt Griffinon Reddit S&P 500 inclusionPositive2:39

    Reddit’s S&P 500 inclusion is set to attract passive buying.

    “The announcement that's set to bring in passive buying for this stock.”

    Listen at 2:39

  4. Matt Griffinon York Space Systems revenue outlook cutNegative2:59

    York Space Systems cut its annual revenue outlook, contributing to a 12% stock decline.

    “York Space System. That's Ticker Y, which is down about 12% after the satellite company slashed its revenue outlook for the year.”

    Listen at 2:59

  5. York Space Systems may receive delayed government contract money eventually, but not this year.

    “So maybe they'll get that money eventually, just not this year.”

    Listen at 3:29

Statements are attributed to the speaker as said on the episode and reflect their view at the time, not PodLume's. They are not advice.

Books & mentions

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SanDisk and Reddit surge while York Space Systems cuts guidance | PodLume