UMC $20.77 pinning levels as of 2026-09-04 · 16:40 ET (after hours)

$UMC

United Microelectronics Corp · Semiconductors · $1.6T

▲ +0.91   (+4.58%)
Snapshot $20.77 · · 2026-09-04 · 16:40 ET (after hours)

The Levels

range held 3 sessions, both sides

Put Wall $19 held 3 sessions
Gamma Flip $16.2 +27.9% above flip
Call Wall $23 held 3 sessions
spot $20.77

Regime pinning · moves get faded back to the walls.

Each wall is the strike carrying the heaviest open interest within 15% of price, call above as resistance, put below as support, pooled across all listed expirations. It is a structural positioning level, not a single expiry pin. Max pain is tracked separately.

The Read

$UMC is in long gamma at heat 46, which means dealers are pinning moves and damping volatility. The $25 call wall is untested yesterday, while the $22 put was pinned last session; this suggests that sellers have been active near $22 but resistance remains above at $25.

Where the market is positioned


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Put / call · OI · all expiries 0.38 · calls-heavy

Plays at the Walls

Covered Call

$24 · Oct 16 · 28Δ

$0.68 premium  ·  29%/yr annualized

Cash-Secured Put

$19 · Oct 16 · 28Δ

$0.73 premium  ·  34%/yr annualized

Not investment advice · Informational only


How our calls on $UMC have played out

Over the last 21 sessions · n=28

28 Walls Called
4 Held 67% 2 pinned · 2 rejected
2 Broke 33%
22 Untested

$20 call wall

held 10 sessions running

$19 put wall

broke 2.7% on 2026-08-18


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Scored Levels


Implied vs Measured


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