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📈 Arm's post-earnings rip is a float squeeze, not a repricing

Chamath's structural read on Arm's move after earnings: only ~10-15m of ~150m shares actually float because SoftBank holds ~90%, and about 12.5m shares were short going into the print, so nearly a full turn of the float was short. The move therefore looks like an enormous short squeeze by funds that were long other chip names and shorting Arm as a spread trade to damp volatility, not a fundamental repricing of a flat licensing business - and a float that thin cuts violently in both directions.

0 CONVICTION
peaked 20.0 EMBER
DORMANT
band
▼ SHORT ARM
expression · bearish equities
WRONG
result · return -24.3% · vs SPY -47.9%
2025-02-16
born 2024-02-16 (E166) → window closed

⚖ Why this result

fully deterministic — computed from daily closes on the scoring date; nothing below is editable or hand-set

  1. Window: 2024-02-16 → 2025-02-16 — first mention + 12-month horizon, then the window locks.
  2. The call: ▼ SHORT ARM (primary play). ARM rose 24.3% over the window → return (sign flipped for a SHORT) = -24.3% (the call lost money).
  3. Benchmark: holding SPY over the same window returned +23.6% → vs SPY = -24.3 − (+23.6) = -47.9% — what this call made or lost against just owning the index. This is the number the result uses.
    Direction-only read: -0.7% — did ARM 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.
  4. Rule fired:
    · RIGHT — return ≥ +10% AND beat SPY by 5+
    · HALF — return ≥ +5% OR beat SPY at all
    ▶ WRONG — everything else
  5. Credit: supporters of a WRONG earn 0 each, opposers the opposite — this feeds the scoreboard. supported: Chamath

Conviction timeline

bands: green ≥ 65 · watch ≥ 45 · ember ≥ 15

Plays vs SPY · % since first mention (2024-02-16)

Plays

expressionsymbolkindrelevancerationale
▼ SHORT ARMstock PRIMARY the squeezed security itself
▼ SHORT SFTBYstock adjacent holds ~90% of Arm, so its reported NAV rides on the Arm mark

Mention log newest first

Chamath
Chamath equities 42% · n=163 · E166 (2024-02-16) · sentiment · strength 2 ▶ 5:51 SUPPORT
“there was almost an entire turn of the float that was short. So I don't know how much of this reaction was just an enormous short squeeze of people that were largely long other chip companies.”

Who built this conviction

each voice's total push on the score, in conviction points across every mention — supports and opposes · share = % of all mention-driven movement

Chamath
Chamath 42%
1 scoring event · 100% of moves
+20.0 → net +20.0

⏳ decay drained -17.3 over the idea's life — that's time passing, attributed to no one

Score events

episodekindΔafternote
E166 2024-02-16 init +20.0 20.0 E166 born by Chamath (sentiment x2)
E167 2024-02-23 decay -0.8 19.2 E167 silent
E168 2024-03-01 decay -0.8 18.4 E168 silent
E169 2024-03-08 decay -0.7 17.7 E169 silent
E170 2024-03-15 decay -0.7 17.0 E170 silent
E171 2024-03-22 decay -0.7 16.3 E171 silent
E172 2024-03-29 decay -0.7 15.7 E172 silent
E173 2024-04-05 decay -0.6 15.0 E173 silent
E174 2024-04-12 decay -0.6 14.4 E174 silent
E175 2024-04-19 decay -0.6 13.9 E175 silent
E176 2024-04-26 decay -0.6 13.3 E176 silent
E177 2024-05-03 decay -0.5 12.8 E177 silent
E178 2024-05-10 decay -0.5 12.3 E178 silent
E179 2024-05-17 decay -0.5 11.8 E179 silent
E180 2024-05-24 decay -0.5 11.3 E180 silent
E181 2024-05-31 decay -0.5 10.8 E181 silent
E182 2024-06-07 decay -0.4 10.4 E182 silent
E183 2024-06-14 decay -0.4 10.0 E183 silent
E184 2024-06-20 decay -0.4 9.6 E184 silent
E185 2024-06-29 decay -0.4 9.2 E185 silent
E186 2024-07-04 decay -0.4 8.8 E186 silent
E187 2024-07-12 decay -0.4 8.5 E187 silent
E188 2024-07-19 decay -0.3 8.1 E188 silent
E189 2024-07-26 decay -0.3 7.8 E189 silent
E190 2024-08-02 decay -0.3 7.5 E190 silent
E191 2024-08-09 decay -0.3 7.2 E191 silent
E192 2024-08-16 decay -0.3 6.9 E192 silent
E193 2024-08-23 decay -0.3 6.6 E193 silent
E194 2024-08-30 decay -0.3 6.4 E194 silent
E195 2024-09-06 decay -0.3 6.1 E195 silent
E196 2024-09-20 decay -0.2 5.9 E196 silent
E197 2024-09-27 decay -0.2 5.6 E197 silent
E198 2024-10-03 decay -0.2 5.4 E198 silent
E199 2024-10-11 decay -0.2 5.2 E199 silent
E200 2024-10-18 decay -0.2 5.0 E200 silent
E201 2024-10-25 decay -0.2 4.8 E201 silent
E202 2024-11-01 decay -0.2 4.6 E202 silent
E203 2024-11-08 decay -0.2 4.4 E203 silent
E204 2024-11-16 decay -0.2 4.2 E204 silent
E205 2024-11-23 decay -0.2 4.1 E205 silent
E206 2024-12-07 decay -0.2 3.9 E206 silent
E207 2024-12-13 decay -0.2 3.8 E207 silent
E208 2024-12-20 decay -0.1 3.6 E208 silent
E209 2025-01-04 decay -0.1 3.5 E209 silent
E210 2025-01-11 decay -0.1 3.3 E210 silent
E211 2025-01-18 decay -0.1 3.2 E211 silent
E212 2025-01-25 decay -0.1 3.1 E212 silent
E213 2025-01-31 decay -0.1 2.9 E213 silent
E214 2025-02-07 decay -0.1 2.8 E214 silent
E215 2025-02-15 decay -0.1 2.7 E215 silent