JUN · ISSUE 24 · June 12, 2026
RISK · MICROSTRUCTUREThe market is thin, not broken
Order-book liquidity at its lowest since April 2025 and dealer gamma negative: the setup where any surprise amplifies in both directions.
VIX
22.22
+11.8% on the day
BOOK LIQUIDITY
lows
since Apr 2025
DEALER GAMMA
negative
amplifies the move
THE NUMBER
22.22
↑ VIX +11.8%, volatile regime above 20
With negative gamma, dealers hedging their positions sell when the market falls and buy when it rises, exaggerating the move. Combined with minimal liquidity, both rebounds and drops turn violent in either direction.
DATA
ZOOM INVIX +11.8%
22.22
▲ +11.8% in a single session
The VIX doesn't predict direction, it predicts the size of the move. Rising like this, it's a warning that big days are back.
The fear index jumps to 22.22. Above 20, the market enters a volatile regime: the range of daily moves widens.
- VOLATILE REGIME
- — A phase with larger-than-normal daily moves (VIX > 20).
- RANGE
- — The distance between the session's high and low.
QUOTE
AUTHORITYMinimal liquidity, negative gamma
“S&P book liquidity is at its lowest since April 2025 and dealer gamma is already negative: any surprise gets amplified in both directions.”
It's the mix that turns a data surprise into an outsized move. The trading desk itself is flagging it.
- BOOK
- — The set of buy and sell orders available in the market.
- DEALER
- — An intermediary that provides liquidity and hedges its options risk.
TREND
VIX · 2 WEEKSFear is climbing again
From complacency below 16 to stress above 22 in two weeks. The market has changed gears.
The VIX over the last two weeks. Crossing above 20 marks the shift from calm to a volatile regime.
- VIX
- — Implied 30-day volatility on the S&P 500.
- COMPLACENCY
- — Excessive calm, often preceding a scare.
MECHANICS
GAMMA + vs -Positive gamma vs negative gamma
POSITIVE GAMMA
Dealers dampen the move
- If the market rises, dealers sell; if it falls, they buy.
- Their hedging brakes the move: the market calms itself.
- Quiet days, tight ranges, low volatility.
NEGATIVE GAMMA
Dealers amplify the move
- If the market rises, dealers buy; if it falls, they sell.
- Their hedging pushes the same way: it exaggerates the move.
- Violent days on both sides. That's where we are today.
The same market behaves in opposite ways depending on the sign of dealer gamma. Today we're on the side that amplifies.
- GAMMA
- — How fast a dealer's hedge changes as the price moves.
- HEDGE
- — Trades that neutralize the risk of a position.
- AMPLIFY
- — To make the price move larger than normal.
EXAMPLE
WHO SELLSWho pulls the trigger when the market drops
Much of the selling on days like this isn't human, it's automatic. That's why moves come so fast. Figures are illustrative.
This is NOT an exact figure: it's an illustrative example of the automatic flows that fire when key levels break.
- CTA
- — A fund that follows trends with automated rules, no human call.
- SYSTEMATIC
- — A strategy that trades by fixed rules, not opinion.
CALENDAR
DRAINSWhat could tighten liquidity further this week
| TODAY · PPI | INFLATION PRINT | High | An upside surprise with negative gamma means an amplified drop. |
| TODAY · ECB | RATE DECISION | Medium | Likely +25 bp despite negative euro-area GDP. |
| 12 JUN · IPO | TECH LISTING | Medium | A large listing drains liquidity from the rest of the market. |
| 16-17 JUN · FOMC | FED MEETING | High | Next week: rate decision and Powell's tone. |
With liquidity already at lows, several events threaten to drain more and amplify the moves.
- DRAIN
- — Liquidity leaving the market for somewhere else.
- PPI
- — Producer Price Index: a binary inflation print for the market.
- FOMC
- — The Fed committee that sets interest rates.
CLOSE
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- NEGATIVE GAMMA
- — A regime where dealer hedging exaggerates the move.
- VIX
- — The fear index: measures the market's expected volatility.