{ "generatedAt": "2026-10-22T16:04:11Z", "url": "https://deepstack.ltd/theses/hbm-not-cowos-binds-first/", "disclaimer": "Analysis and opinion, not investment advice.", "id": "hbm-not-cowos-binds-first", "number": 13, "question": "Will HBM supply, rather than advanced packaging capacity, be named by Nvidia or TSMC as the primary accelerator supply constraint in any 2027 earnings call?", "dek": "The binding constraint migrates from CoWoS interposer capacity to HBM stacking and DRAM supply, so the named bottleneck in 2027 is memory rather than packaging.", "family": "T02", "subthesis": "T02.02", "sector": "AI.SEMI", "subsectors": [ "AI.SEMI.PKG", "AI.MEM.HBM", "AI.POWER.GRIDEQ", "AI.NET.OPTIC" ], "relatedParts": [], "approvedAt": "2026-10-22T01:56:07Z", "sectorName": "Semiconductors & Compute Silicon", "api": "https://deepstack.ltd/api/v1/theses/hbm-not-cowos-binds-first.json", "sides": [ { "id": "yes", "label": "Memory supply, not packaging, becomes the named constraint", "summary": "HBM stack counts per accelerator rise from 8 to 16+ while DRAM makers expanded cautiously after the COVID cycle, making memory bit supply scale slower than interposer area. Suppliers that under-invested after that cycle now face demand that accelerated past forecasts, and headline capex gets partly absorbed by price rather than new bit supply. Accelerator shipment caps end up set by HBM allocation and price, with bottleneck economics transferring to memory vendors rather than packaging houses.", "voices": [ { "name": "Longriver", "entity": "https://deepstack.ltd/people/longriver/", "claim": "Suppliers cut or under-invested after the COVID cycle while demand accelerated past forecasts, so capacity is scarce at critical points; headline capex is partly absorbed by price, duplicated sites and system coordination, and the firms that…", "date": "2026-07-20", "url": "https://fiscal.ai/fund-letters/longriver-investment-partners-limited-q2-2026-fscl_document_8HDF9YVG683" }, { "name": "Daniel Romero", "entity": "https://deepstack.ltd/people/daniel-romero/", "claim": "You can only demand what can be supplied; when the largest backers deploy billions expecting outperformance, compute demand rises against bottlenecks that will not be resolved before 2028 at a minimum, transferring economics to bottleneck owners.", "date": "2026-04-08", "url": "https://hypertechinvest.substack.com/p/semiconductor-bottlenecks-stock-opportunities" } ] }, { "id": "no", "label": "Packaging, not memory, stays the named constraint", "summary": "Transistor density scaling via Moore's Law becomes increasingly difficult and costly, so advanced packaging techniques such as fan-out panels, hybrid bonding and HBM stacking become the primary lever for scaling compute performance, with packaging the chokepoint through which further AI scaling must pass. Packaging capacity was already at its tightest in early 2024, when xAI, Anthropic, OpenAI and Google were all drawing from the same pool, and modern accelerators exceed what lithography can print in one shot, forcing chiplet-style packaging solutions. This side would be confirmed if Nvidia and TSMC both continue to name packaging, not memory, as the limiting input through 2027.", "voices": [ { "name": "Daniel Romero", "entity": "https://deepstack.ltd/people/daniel-romero/", "claim": "As shrinking transistors further becomes harder, the industry shifts to packaging-level innovations (CPO switches, HBM stacking, larger logic reticle sizes) to keep scaling compute, making advanced packaging the chokepoint through which further AI…", "date": "2026-09-08", "url": "https://hypertechinvest.com/p/the-best-stocks-i-found-at-semicon" }, { "name": "Ruben Dominguez", "entity": "https://deepstack.ltd/people/ruben-dominguez/", "claim": "In early 2024, TSMC chip packaging capacity was at absolute tightest. That was when xAI began assembling what would become Colossus. Every unit locked up at that point came directly out of a pool that Anthropic, OpenAI and Google were also drawing…", "date": "2026-06-19", "url": "https://www.thevccorner.com/p/elon-musk-wins-before-the-race-starts" }, { "name": "Tscsw", "entity": null, "claim": "Modern AI accelerators exceed the physical size that EUV lithography can print in a single shot. The solution is not larger chips but better packaging through chiplets. Multiple smaller dies assembled on shared substrates enable higher yields…", "date": "2026-02-08", "url": "https://tscsw.substack.com/p/semiconductor-equipment-primer-13" }, { "name": "Citrini", "entity": null, "claim": "A visible frontier win pressures competitors to spend, and since they cannot cheaply change accelerator ecosystems the spending lands on Nvidia's next generation. The binding constraint therefore shows up in packaging and infrastructure supply…", "date": "2025-11-27", "url": "https://www.citriniresearch.com/p/carving-up-the-tpu" } ] } ], "tests": [ { "id": "th013-t01", "part": null, "thesis": 13, "slug": "hbm-not-cowos-binds-first", "when": "November 3, 2026", "whenLabel": "Nov 3, 2026", "date": "2026-11-03", "precision": "day", "event": "Advanced Micro Devices, gross margin, quarter ended September 26, 2026: whether it comes in at or above 51%.", "status": "pending", "resultId": null, "sameAs": null, "stage": "pre", "callExpects": "yes", "callExpectsBy": "Desk Editor (level A)", "callExpectsAt": "2026-10-22T03:45:00Z", "callProbability": 72, "callProbabilityAt": "2026-10-22T03:45:00Z", "callProbabilityHistory": [], "source": { "kind": "thesis", "ref": "tests[0].date", "url": null }, "resolver": { "kind": "manual", "rule": "Divide the gross profit by the revenue that Advanced Micro Devices reports for the quarter ended September 26, 2026 in its 10-Q or 10-K filing on SEC EDGAR. The answer is yes if the ratio is at or above 51.0%; no if it is below 51.0%.", "question": "Did the gross profit of Advanced Micro Devices for the quarter ended September 26, 2026 come to at or above 51.0% of its revenue?", "source": { "label": "SEC EDGAR, XBRL company facts of Advanced Micro Devices (Forms 10-Q and 10-K)", "url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0000002488.json" }, "ambiguity": "If Advanced Micro Devices has not filed by November 12, 2026, or a filing restates a period the rule reads, the test is inconclusive, and the Result says what was read and what was missing.", "specState": "approved", "specVersion": 1, "specUpdatedOn": "2026-10-22", "specHistory": [ { "version": 1, "date": "2026-10-22", "reason": "First specification.", "by": "Desk Editor (level A)" } ], "callExpects": "yes", "format": "ladder", "group": "th013-amd-gross-margin", "threshold": 51, "direction": "above", "unit": "%", "think": { "baseRate": "Advanced Micro Devices's gross margin was 53.8% for the quarter ended June 27, 2026, by its filing on SEC EDGAR.", "outsideView": "A year earlier, for the quarter ended June 28, 2025, the same line read 39.8%, so the rungs sit on the last print.", "wouldChange": "A change in product mix, a one-time charge, or a reclassified line would move the reading." } }, "url": "https://deepstack.ltd/docket/#test-th013-t01", "storyUrl": "https://deepstack.ltd/theses/hbm-not-cowos-binds-first/#tests", "resultUrl": null, "machines": [ { "model": "claude-opus-5", "p": 63, "at": "2026-10-22T02:49:38Z" }, { "model": "deepseek-reasoner", "p": 72, "at": "2026-10-22T02:50:00Z" }, { "model": "gpt-5", "p": 65, "at": "2026-10-22T02:50:35Z" } ], "readers": null }, { "id": "th013-t02", "part": null, "thesis": 13, "slug": "hbm-not-cowos-binds-first", "when": "November 3, 2026", "whenLabel": "Nov 3, 2026", "date": "2026-11-03", "precision": "day", "event": "Advanced Micro Devices, gross margin, quarter ended September 26, 2026: whether it comes in at or above 53%.", "status": "pending", "resultId": null, "sameAs": null, "stage": "pre", "callExpects": "either", "callExpectsBy": "Desk Editor (level A)", "callExpectsAt": "2026-10-22T03:45:00Z", "callProbability": 48, "callProbabilityAt": "2026-10-22T03:45:00Z", "callProbabilityHistory": [], "source": { "kind": "thesis", "ref": "tests[1].date", "url": null }, "resolver": { "kind": "manual", "rule": "Divide the gross profit by the revenue that Advanced Micro Devices reports for the quarter ended September 26, 2026 in its 10-Q or 10-K filing on SEC EDGAR. The answer is yes if the ratio is at or above 53.0%; no if it is below 53.0%.", "question": "Did the gross profit of Advanced Micro Devices for the quarter ended September 26, 2026 come to at or above 53.0% of its revenue?", "source": { "label": "SEC EDGAR, XBRL company facts of Advanced Micro Devices (Forms 10-Q and 10-K)", "url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0000002488.json" }, "ambiguity": "If Advanced Micro Devices has not filed by November 12, 2026, or a filing restates a period the rule reads, the test is inconclusive, and the Result says what was read and what was missing.", "specState": "approved", "specVersion": 1, "specUpdatedOn": "2026-10-22", "specHistory": [ { "version": 1, "date": "2026-10-22", "reason": "First specification.", "by": "Desk Editor (level A)" } ], "callExpects": "either", "format": "ladder", "group": "th013-amd-gross-margin", "threshold": 53, "direction": "above", "unit": "%", "think": { "baseRate": "Advanced Micro Devices's gross margin was 53.8% for the quarter ended June 27, 2026, by its filing on SEC EDGAR.", "outsideView": "A year earlier, for the quarter ended June 28, 2025, the same line read 39.8%, so the rungs sit on the last print.", "wouldChange": "A change in product mix, a one-time charge, or a reclassified line would move the reading." } }, "url": "https://deepstack.ltd/docket/#test-th013-t02", "storyUrl": "https://deepstack.ltd/theses/hbm-not-cowos-binds-first/#tests", "resultUrl": null, "machines": [ { "model": "claude-opus-5", "p": 40, "at": "2026-10-22T02:50:39Z" }, { "model": "deepseek-reasoner", "p": 40, "at": "2026-10-22T02:51:07Z" }, { "model": "gpt-5", "p": 48, "at": "2026-10-22T02:51:48Z" } ], "readers": null }, { "id": "th013-t03", "part": null, "thesis": 13, "slug": "hbm-not-cowos-binds-first", "when": "November 3, 2026", "whenLabel": "Nov 3, 2026", "date": "2026-11-03", "precision": "day", "event": "Advanced Micro Devices, gross margin, quarter ended September 26, 2026: whether it comes in at or above 55%.", "status": "pending", "resultId": null, "sameAs": null, "stage": "pre", "callExpects": "no", "callExpectsBy": "Desk Editor (level A)", "callExpectsAt": "2026-10-22T03:45:00Z", "callProbability": 25, "callProbabilityAt": "2026-10-22T03:45:00Z", "callProbabilityHistory": [], "source": { "kind": "thesis", "ref": "tests[2].date", "url": null }, "resolver": { "kind": "manual", "rule": "Divide the gross profit by the revenue that Advanced Micro Devices reports for the quarter ended September 26, 2026 in its 10-Q or 10-K filing on SEC EDGAR. The answer is yes if the ratio is at or above 55.0%; no if it is below 55.0%.", "question": "Did the gross profit of Advanced Micro Devices for the quarter ended September 26, 2026 come to at or above 55.0% of its revenue?", "source": { "label": "SEC EDGAR, XBRL company facts of Advanced Micro Devices (Forms 10-Q and 10-K)", "url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0000002488.json" }, "ambiguity": "If Advanced Micro Devices has not filed by November 12, 2026, or a filing restates a period the rule reads, the test is inconclusive, and the Result says what was read and what was missing.", "specState": "approved", "specVersion": 1, "specUpdatedOn": "2026-10-22", "specHistory": [ { "version": 1, "date": "2026-10-22", "reason": "First specification.", "by": "Desk Editor (level A)" } ], "callExpects": "no", "format": "ladder", "group": "th013-amd-gross-margin", "threshold": 55, "direction": "above", "unit": "%", "think": { "baseRate": "Advanced Micro Devices's gross margin was 53.8% for the quarter ended June 27, 2026, by its filing on SEC EDGAR.", "outsideView": "A year earlier, for the quarter ended June 28, 2025, the same line read 39.8%, so the rungs sit on the last print.", "wouldChange": "A change in product mix, a one-time charge, or a reclassified line would move the reading." } }, "url": "https://deepstack.ltd/docket/#test-th013-t03", "storyUrl": "https://deepstack.ltd/theses/hbm-not-cowos-binds-first/#tests", "resultUrl": null, "machines": [ { "model": "claude-opus-5", "p": 33, "at": "2026-10-22T02:51:52Z" }, { "model": "deepseek-reasoner", "p": 17, "at": "2026-10-22T02:52:04Z" }, { "model": "gpt-5", "p": 35, "at": "2026-10-22T02:52:28Z" } ], "readers": null }, { "id": "th013-t04", "part": null, "thesis": 13, "slug": "hbm-not-cowos-binds-first", "when": "November 18, 2026", "whenLabel": "Nov 18, 2026", "date": "2026-11-18", "precision": "day", "event": "NVIDIA, gross margin, quarter ended October 25, 2026: whether it comes in at or above 73%.", "status": "pending", "resultId": null, "sameAs": null, "stage": "pre", "callExpects": "yes", "callExpectsBy": "Desk Editor (level A)", "callExpectsAt": "2026-10-22T03:45:00Z", "callProbability": 70, "callProbabilityAt": "2026-10-22T03:45:00Z", "callProbabilityHistory": [], "source": { "kind": "thesis", "ref": "tests[3].date", "url": null }, "resolver": { "kind": "earnings", "symbol": "NVDA", "rule": "Divide the gross profit by the revenue that Nvidia reports for the quarter ended October 25, 2026 in its 10-Q or 10-K filing on SEC EDGAR. The answer is yes if the ratio is at or above 73.0%; no if it is below 73.0%.", "question": "Did the gross profit of Nvidia for the quarter ended October 25, 2026 come to at or above 73.0% of its revenue?", "source": { "label": "SEC EDGAR, XBRL company facts of Nvidia (Forms 10-Q and 10-K)", "url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001045810.json" }, "ambiguity": "If Nvidia has not filed by December 11, 2026, or a filing restates a period the rule reads, the test is inconclusive, and the Result says what was read and what was missing.", "specState": "approved", "specVersion": 1, "specUpdatedOn": "2026-10-22", "specHistory": [ { "version": 1, "date": "2026-10-22", "reason": "First specification.", "by": "Desk Editor (level A)" } ], "callExpects": "yes", "format": "ladder", "group": "th013-nvda-gross-margin", "threshold": 73, "direction": "above", "unit": "%", "think": { "baseRate": "NVIDIA's gross margin was 75.0% for the quarter ended July 26, 2026, by its filing on SEC EDGAR.", "outsideView": "A year earlier, for the quarter ended July 27, 2025, the same line read 72.4%, so the rungs sit on the last print.", "wouldChange": "A change in product mix, a one-time charge, or a reclassified line would move the reading." } }, "url": "https://deepstack.ltd/docket/#test-th013-t04", "storyUrl": "https://deepstack.ltd/theses/hbm-not-cowos-binds-first/#tests", "resultUrl": null, "machines": [ { "model": "claude-opus-5", "p": 63, "at": "2026-10-22T02:52:32Z" }, { "model": "deepseek-reasoner", "p": 66, "at": "2026-10-22T02:53:03Z" } ], "readers": null }, { "id": "th013-t05", "part": null, "thesis": 13, "slug": "hbm-not-cowos-binds-first", "when": "November 18, 2026", "whenLabel": "Nov 18, 2026", "date": "2026-11-18", "precision": "day", "event": "NVIDIA, gross margin, quarter ended October 25, 2026: whether it comes in at or above 75%.", "status": "pending", "resultId": null, "sameAs": null, "stage": "pre", "callExpects": "no", "callExpectsBy": "Desk Editor (level A)", "callExpectsAt": "2026-10-22T03:45:00Z", "callProbability": 44, "callProbabilityAt": "2026-10-22T03:45:00Z", "callProbabilityHistory": [], "source": { "kind": "thesis", "ref": "tests[4].date", "url": null }, "resolver": { "kind": "earnings", "symbol": "NVDA", "rule": "Divide the gross profit by the revenue that Nvidia reports for the quarter ended October 25, 2026 in its 10-Q or 10-K filing on SEC EDGAR. The answer is yes if the ratio is at or above 75.0%; no if it is below 75.0%.", "question": "Did the gross profit of Nvidia for the quarter ended October 25, 2026 come to at or above 75.0% of its revenue?", "source": { "label": "SEC EDGAR, XBRL company facts of Nvidia (Forms 10-Q and 10-K)", "url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001045810.json" }, "ambiguity": "If Nvidia has not filed by December 11, 2026, or a filing restates a period the rule reads, the test is inconclusive, and the Result says what was read and what was missing.", "specState": "approved", "specVersion": 1, "specUpdatedOn": "2026-10-22", "specHistory": [ { "version": 1, "date": "2026-10-22", "reason": "First specification.", "by": "Desk Editor (level A)" } ], "callExpects": "no", "format": "ladder", "group": "th013-nvda-gross-margin", "threshold": 75, "direction": "above", "unit": "%", "think": { "baseRate": "NVIDIA's gross margin was 75.0% for the quarter ended July 26, 2026, by its filing on SEC EDGAR.", "outsideView": "A year earlier, for the quarter ended July 27, 2025, the same line read 72.4%, so the rungs sit on the last print.", "wouldChange": "A change in product mix, a one-time charge, or a reclassified line would move the reading." } }, "url": "https://deepstack.ltd/docket/#test-th013-t05", "storyUrl": "https://deepstack.ltd/theses/hbm-not-cowos-binds-first/#tests", "resultUrl": null, "machines": [ { "model": "claude-opus-5", "p": 40, "at": "2026-10-22T02:54:08Z" }, { "model": "deepseek-reasoner", "p": 28, "at": "2026-10-22T02:54:29Z" }, { "model": "gpt-5", "p": 47, "at": "2026-10-22T02:55:13Z" } ], "readers": null }, { "id": "th013-t06", "part": null, "thesis": 13, "slug": "hbm-not-cowos-binds-first", "when": "November 18, 2026", "whenLabel": "Nov 18, 2026", "date": "2026-11-18", "precision": "day", "event": "NVIDIA, gross margin, quarter ended October 25, 2026: whether it comes in at or above 77%.", "status": "pending", "resultId": null, "sameAs": null, "stage": "pre", "callExpects": "no", "callExpectsBy": "Desk Editor (level A)", "callExpectsAt": "2026-10-22T03:45:00Z", "callProbability": 19, "callProbabilityAt": "2026-10-22T03:45:00Z", "callProbabilityHistory": [], "source": { "kind": "thesis", "ref": "tests[5].date", "url": null }, "resolver": { "kind": "earnings", "symbol": "NVDA", "rule": "Divide the gross profit by the revenue that Nvidia reports for the quarter ended October 25, 2026 in its 10-Q or 10-K filing on SEC EDGAR. The answer is yes if the ratio is at or above 77.0%; no if it is below 77.0%.", "question": "Did the gross profit of Nvidia for the quarter ended October 25, 2026 come to at or above 77.0% of its revenue?", "source": { "label": "SEC EDGAR, XBRL company facts of Nvidia (Forms 10-Q and 10-K)", "url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001045810.json" }, "ambiguity": "If Nvidia has not filed by December 11, 2026, or a filing restates a period the rule reads, the test is inconclusive, and the Result says what was read and what was missing.", "specState": "approved", "specVersion": 1, "specUpdatedOn": "2026-10-22", "specHistory": [ { "version": 1, "date": "2026-10-22", "reason": "First specification.", "by": "Desk Editor (level A)" } ], "callExpects": "no", "format": "ladder", "group": "th013-nvda-gross-margin", "threshold": 77, "direction": "above", "unit": "%", "think": { "baseRate": "NVIDIA's gross margin was 75.0% for the quarter ended July 26, 2026, by its filing on SEC EDGAR.", "outsideView": "A year earlier, for the quarter ended July 27, 2025, the same line read 72.4%, so the rungs sit on the last print.", "wouldChange": "A change in product mix, a one-time charge, or a reclassified line would move the reading." } }, "url": "https://deepstack.ltd/docket/#test-th013-t06", "storyUrl": "https://deepstack.ltd/theses/hbm-not-cowos-binds-first/#tests", "resultUrl": null, "machines": [ { "model": "claude-opus-5", "p": 40, "at": "2026-10-22T02:55:17Z" }, { "model": "deepseek-reasoner", "p": 11, "at": "2026-10-22T02:55:28Z" }, { "model": "gpt-5", "p": 29, "at": "2026-10-22T02:56:12Z" } ], "readers": null } ] }