📈 Private venture marks are stale by design — nobody is paid to fix them
Gurley's structural claim: GPs assess their own portfolio marks (a conflict), and many LPs are bonused on those same paper marks, so neither side has an incentive to push them down. Private venture marks therefore sit far above reality — public growth down ~50% while private books are down 5-10% — until a financing, a secondary, a recap or a down-round IPO forces the reset. The listed read-through is the alt managers and holding companies whose reported NAV is a book of self-assessed private marks.
also touching these tickers, same direction: Private equity model is broken 14 (BX) · Endowment liquidity crunch forces discounted private-equity secondaries 12 (BX)
⚖ Why this verdict
fully deterministic — evaluate.py replays this from daily closes; nothing below is editable or hand-set
- Window: 2023-08-11 → 2024-08-11 — first mention + 12-month horizon, then the window locks.
- The call: ▼ SHORT BX (primary play). BX rose 37.0% over the window → direction-adjusted R = -37.0% (the call lost money).
- Benchmark: holding SPY over the same window returned +21.3%
→ α = -37.0 − (+21.3) = -58.3%
— what this call made or lost against just owning the index. This is the number the verdict uses.
Stock-selection read: -15.7% — did BX move the predicted way relative to the market. The two only differ on a SHORT: this call was right about direction relative to the index but still cost money versus holding it.
- Rule fired:
· HIT — R ≥ +10% AND α ≥ +5· PARTIAL — R ≥ +5% OR α ≥ 0▶ MISS — everything else
- Credit: supporters of a MISS earn 0 each, opposers the inverse — this feeds the scoreboard weights. supported: Bill Gurley, Chamath, Jason, Sacks
Conviction timeline
bands: green ≥ 65 · watch ≥ 45 · ember ≥ 15
Plays vs SPY · % since first mention (2023-08-11)
Plays
| expression | symbol | kind | relevance | rationale |
|---|---|---|---|---|
| ▼ SHORT | BX | stock | PRIMARY | alt manager whose fee-earning AUM and equity value ride on self-reported private marks |
| ▼ SHORT | IPO | etf | adjacent | recent-IPO cohort is where the private-to-public mark gap actually gets printed |
| ▼ SHORT | SFTBY | stock | adjacent | SoftBank's NAV is a book of late-stage private marks that has to converge on public comps |
Mention log
“The other thing is many LPs are actually bonus on the paper mark. And this is something that a lot of people don't realize. And so they don't have an incentive to dial around to the GPs and say, get your marks right, because it's actually going to reflect poorly on them if they were to roll those up.”
“if you look at Adyen, what does it mean about Stripe? And I think the answer is that Stripe at that $50 billion round, $55 billion round is worth 25 billion. So there's a 50% markdown right there.”
“we had a segment a couple of weeks ago where we were talking about these high-priced, late-stage unicorn rounds needing to get revalued. The IPO of Instacart was a good example of this where, yes, the IPO did about $10 billion, but the last private round was at $39 billion. So there is a big wave of revaluations or down rounds coming.”
“But I don't like it. I don't like these kinds of things where one fund is basically scratching the back of another fund. It always tends to be the case that this stuff on the surface looks a little smelly and can be a little unseemly.”
“Normally, what would happen in terms of figuring out the price is you'd want to use some validated secondary price, but obviously, it would have to be a market clearing price where new money wants to come in at that price. This is a little bit different because it's their pre-existing fund that's buying at that price.”
Who built this conviction
each voice's total force on the score — supports and opposes from every mention, weighted exactly as the replay applied them · share = % of all mention-driven movement
⏳ decay drained -81.7 over the idea's life — that's time passing, attributed to no one
Score events
| episode | kind | Δ | after | note |
|---|---|---|---|---|
| E141 2023-08-11 | init | +26.7 | 26.7 | E141 born by Bill Gurley (sentiment x3) [w=1.11] |
| E141 2023-08-11 | reinforce | +16.0 | 42.7 | E141 Jason support x2 (new voice) [w=0.97] |
| E141 2023-08-11 | reinforce | +11.4 | 54.1 | E141 Sacks support x2 (new voice) [w=0.89] |
| E142 2023-08-18 | reinforce | +10.4 | 64.5 | E142 Chamath support x3 (new voice) [w=0.84] |
| E142 2023-08-18 | reinforce | +3.8 | 68.3 | E142 Sacks support x1 [w=0.89] |
| E143 2023-08-25 | decay | -2.7 | 65.5 | E143 silent |
| E144 2023-09-01 | decay | -2.6 | 62.9 | E144 silent |
| E146 2023-09-22 | reinforce | +4.9 | 67.8 | E146 Sacks support x2 [w=0.89] |
| E146 2023-09-22 | reinforce | +4.7 | 72.5 | E146 Jason support x2 [w=0.97] |
| E147 2023-09-29 | decay | -2.9 | 69.6 | E147 silent |
| E148 2023-10-07 | reinforce | +4.0 | 73.7 | E148 Sacks support x2 [w=0.89] |
| E149 2023-10-13 | decay | -2.9 | 70.7 | E149 silent |
| E150 2023-10-20 | decay | -2.8 | 67.9 | E150 silent |
| E151 2023-10-27 | reinforce | +4.8 | 72.7 | E151 Chamath support x3 [w=0.84] |
| E151 2023-10-27 | reinforce | +4.0 | 76.7 | E151 Jason support x2 [w=0.97] |
| E151 2023-10-27 | reinforce | +3.1 | 79.8 | E151 Sacks support x2 [w=0.89] |
| E152 2023-11-03 | decay | -3.2 | 76.6 | E152 silent |
| E156 2023-12-08 | reinforce | +3.5 | 80.1 | E156 Chamath support x3 [w=0.84] |
| E157 2023-12-16 | decay | -3.2 | 76.9 | E157 silent |
| E158 2023-12-23 | decay | -3.1 | 73.8 | E158 silent |
| E159 2023-12-29 | decay | -3.0 | 70.9 | E159 silent |
| E160 2024-01-06 | decay | -2.8 | 68.1 | E160 silent |
| E161 2024-01-13 | reinforce | +4.2 | 72.3 | E161 Sacks support x2 [w=0.89] |
| E162 2024-01-19 | decay | -2.9 | 69.4 | E162 silent |
| E163 2024-01-26 | decay | -2.8 | 66.6 | E163 silent |
| E164 2024-02-02 | decay | -2.7 | 64.0 | E164 silent |
| E165 2024-02-09 | decay | -2.6 | 61.4 | E165 silent |
| E166 2024-02-16 | decay | -2.5 | 59.0 | E166 silent |
| E167 2024-02-23 | decay | -2.4 | 56.6 | E167 silent |
| E168 2024-03-01 | decay | -2.3 | 54.3 | E168 silent |
| E169 2024-03-08 | decay | -2.2 | 52.2 | E169 silent |
| E170 2024-03-15 | decay | -2.1 | 50.1 | E170 silent |
| E171 2024-03-22 | decay | -2.0 | 48.1 | E171 silent |
| E172 2024-03-29 | decay | -1.9 | 46.1 | E172 silent |
| E173 2024-04-05 | decay | -1.8 | 44.3 | E173 silent |
| E174 2024-04-12 | decay | -1.8 | 42.5 | E174 silent |
| E175 2024-04-19 | decay | -1.7 | 40.8 | E175 silent |
| E176 2024-04-26 | decay | -1.6 | 39.2 | E176 silent |
| E177 2024-05-03 | decay | -1.6 | 37.6 | E177 silent |
| E178 2024-05-10 | decay | -1.5 | 36.1 | E178 silent |
| E179 2024-05-17 | decay | -1.4 | 34.7 | E179 silent |
| E180 2024-05-24 | decay | -1.4 | 33.3 | E180 silent |
| E181 2024-05-31 | decay | -1.3 | 32.0 | E181 silent |
| E182 2024-06-07 | decay | -1.3 | 30.7 | E182 silent |
| E183 2024-06-14 | decay | -1.2 | 29.5 | E183 silent |
| E184 2024-06-20 | decay | -1.2 | 28.3 | E184 silent |
| E185 2024-06-29 | decay | -1.1 | 27.1 | E185 silent |
| E186 2024-07-04 | decay | -1.1 | 26.1 | E186 silent |
| E187 2024-07-12 | decay | -1.0 | 25.0 | E187 silent |
| E188 2024-07-19 | reinforce | +11.3 | 36.3 | E188 Chamath support x3 [w=0.84] |
| E188 2024-07-19 | reinforce | +8.5 | 44.8 | E188 Sacks support x2 [w=0.89] |
| E189 2024-07-26 | decay | -1.8 | 43.0 | E189 silent |
| E190 2024-08-02 | decay | -1.7 | 41.3 | E190 silent |
| E191 2024-08-09 | decay | -1.7 | 39.6 | E191 silent |