Spot and volatility regime

BTC spot is around 76,803, slightly softer on the day and still weaker on the week. The daily chart remains above EMA50/100/200, but price has rolled back below EMA20; the 4h chart is softer again, below EMA20/50/100 and only still above EMA200. That keeps the higher-time-frame trend intact, but short-horizon repair has clearly deteriorated, leaving the tape more range-bound and reactive.

On the monthly ATR framework, price is still in the upper-middle part of the range but has moved back toward the lower trigger at 74.6k, with the upper trigger up at 82.4k. The current swing uses only about 38% of the monthly ATR range, so the move is not stretched, but the character has changed from upper-range consolidation to a retest of the lower edge. In other words, this is still a neutral framework with a softer bias, not structural damage.

IV term structure, skew & DVOL regime

Implied vol surface

The term structure remains broadly upward sloping, but the front end repriced harder. ATM IV sits around 28.8% near the front and then climbs into the low-40s farther out; the 5P and 10P wings are richer still, with short-to-intermediate puts mostly in the 30s and some front-end wings above 40%. Back-end tenors also lifted, but less aggressively than the short end, so this was more a front-loaded repricing than a parallel shift.

Skew continued to steepen, with put wings remaining richer than ATM across the curve. The richest front- and mid-dated pricing is still in downside protection, while call wings firmed as well but remain secondary. Short-dated skew is steeper than the medium-dated area, reinforcing the idea that immediate downside insurance and near-term two-way risk are being paid for more aggressively.

DVOL index

DVOL is at 38.89, up about 5% on the day, although still slightly lower on the week. The 1Y IV Rank / IV Percentile remains in a historically low band, roughly low-teens rank and around 30th percentile; the 3M band is firmer, around mid-30s rank and mid-60s percentile. So DVOL is not in an elevated volatility regime, but it is clearly repairing from a subdued base, and that repair is moving faster than spot.

Options chain structure

Open interest remains concentrated in 25SEP26, with 8–30d and 90d+ buckets carrying the bulk of positioning, but today’s activity moved closer to expiry. 0DTE (expires same calendar day) and 1–7d participation increased, showing more aggressive front-end repricing around spot. The most sensitive strikes remain 76k, 77k, 78k, 79k, and 80k, which is where both flow and open interest are most concentrated.

By Tenor bucket rollup, 8–30d is still the main anchor, but 1–7d traded flow and Open Interest (OI) changes were clearly more active, and 0DTE (expires same calendar day) was not just background noise. By near-spot structure, the 80k area still carries the clearest call concentration, while the 75k area remains the primary put defense. In other words, the chain still trades like a near-month spine with a more active front end, not like a clean roll outward in Tenor bucket rollup.

Net greeks and expiry × delta structure

Net greeks are more balanced than yesterday, but still mixed rather than cleanly directional. By expiry, 18SEP26 remains one of the clearest short-dated sell-vega / sell-gamma windows, and 15SEP26 and 16SEP26 also lean toward vega/gamma supply. At the same time, 17SEP26, 25SEP26, 30OCT26, and parts of 26MAR27 show buy-vega / buy-gamma demand, so the front end is not one-way; it is a more contested two-sided market.

By strike, 78k, 79k, 80k, and 77k remain the most important gamma bands, with 78k/79k/80k the most sensitive in absolute terms. The 75k area remains a key defense zone with persistent put interest. The 80k call wall is still visible above spot, but there is no sign of a broad one-way push into higher exposure there; instead, the tape is rebalancing around several adjacent pivots. For desks, that means passive hedging around 77k–80k is still likely to dominate intraday behavior.

Block and combo block trade flow (24h)

Block and combo prints in the 24 hours through the report snapshot at 00:00 UTC on 13 Sep 2026 (rolling window, not the calendar report day).

Across that window, block/combo flow shifted from net selling yesterday to net buying today. Combined net vega and net gamma both turned positive, which points to a clear pickup in long vol and long convexity demand. The mix was led by call spreads, then standalone blocks, straddles, and a smaller mix of put spreads, ratio structures, and calendar/diagonal trades, so this does not read like simple directional chasing; it looks more like structured vol allocation.

On Tenor bucket rollup, the activity was front-end led, especially across the 1–7d and 8–30d buckets, with a heavy concentration around 18SEP26, 25SEP26, and 30OCT26. Cross-checking against the options chain and net greeks, these prints line up with the dense 77k–80k area and the 25SEP26 spine. Some of the longer-dated structures look more like roll/hedge activity, but they do not change the main message: the front end got busier and more vol-sensitive.

2. What Changed vs Prior Session(s)

• Spot drifted lower from the 77.3k area to around 76.8k, slipping back below daily EMA20 and leaving the 4h structure materially softer.
• On the range framework, price moved closer to the lower ATR trigger, so the market shifted from upper-range consolidation toward a test of the range floor.
• DVOL turned higher, and front-end ATM as well as put-wing IV richened, which means the previously subdued short-dated vol regime is being repriced.
• 0DTE (expires same calendar day) and 1–7d activity picked up, so the chain’s center of gravity moved even closer to the front end.
• Block/combo flow flipped from net selling to net buying, a clear shift in positioning and vol demand.
• Net greeks lost some of yesterday’s cleaner sell-vega / sell-gamma tilt and moved into a more balanced, two-sided profile.

3. Multi-Day Context

Over the past week, the dominant pattern has been a softer spot structure after the highs, with options repeatedly re-pricing around the 75k–80k zone and the 25SEP26 spine. The price trend has remained constructive at the larger time-frame level, but the short horizon has repeatedly weakened, and today fit that pattern again.

What changed today is that the front-end vol repair became more explicit. DVOL is rising from a low band, the front-end vol surface is forcing a higher short-dated risk premium, and block/combo activity has moved back toward long vol. So the week’s core theme is not “directional breakout”; it is increasingly “range-bound trading with more active hedging and a more expensive front end.”

Today reinforced the weekly theme of rising short-dated volatility inside a still-intact broader range, while weakening the idea of a clean near-term trend continuation.

4. Key Levels and Risk Zones

• First upside barrier: 80k, which is both the call wall and the most important front-end gamma zone.
• Higher upside reference: 82k–84k, where call interest remains visible but looks more like secondary resistance.
• First downside support: 75k, the clearest put wall and the most important defensive reference.
• Lower downside reference: 74k and then 72k, where put interest is still thick and where a 75k break could accelerate passive hedging.
• Core trading zone: 77k–80k. This is where spot, Open Interest (OI), gamma sensitivity, and wall structure are all most concentrated, so it is the most likely area for intraday churn.
• Monthly ATR triggers: upper around 82.4k, lower around 74.6k. Spot is closer to the lower trigger now, which raises the odds of a downside test.

5. Scenario Map for Next Session

Base case

If spot holds above 75k and continues trading back and forth inside the 77k–80k band, the tape should stay wall-driven and mean-reverting. Front-end gamma is still sensitive, so realized intraday volatility can stay elevated even without a clean directional break.

Upside case

If spot reclaims 78k and can hold back above 4h EMA20/50, the short-term repair improves. In that case, watch whether the 80k call wall is absorbed or lifted; if DVOL stops rising at the same time, follow-through becomes more credible.

Downside case

If 75k breaks, the next test is the monthly lower trigger near 74.6k. A clean breach of the 75k put wall could amplify passive hedging and push the market toward the 74k and 72k put-heavy zones.

What to monitor

• How spot behaves inside 77k–80k: tight pinning vs fast two-way rotation.
• Whether the 80k call wall keeps absorbing or starts to migrate higher/lower.
• Whether the 75k put wall starts to come under pressure, especially in 0DTE (expires same calendar day) and 1–7d flow.
• Whether DVOL extends higher, especially if it continues to climb out of the low-rank band.
• Whether block/combo remains net buying or slips back toward seller dominance.
• Whether front-end activity around 18SEP26 and 25SEP26 stays concentrated, since that will tell us whether the front end remains the main battlefield.

6. Trader Focus

• Spot is still in a neutral framework, but the short-term structure has weakened again.
• The core battle remains 25SEP26 and the 77k–80k near-spot zone; wall trading is not over.
• Both the vol surface and DVOL are repairing, so short-dated vol premium is back.
• Block/combo flipping to net buying is the most important positioning change of the day.
• The next session is less about calling direction and more about whether the 75k–80k band keeps attracting flow, hedging, and wall interaction.

Interpretation

Today looks like a short-dated vol repricing and a test of the range boundary, not a confirmation of a directional trend. Spot has not broken the higher-level structure, but the short-term EMA stack, DVOL, skew, and block flow all point to a more active hedging environment.

Observation

• 77k–80k is the key intraday band.
• 80k call wall and 75k put wall remain the two anchors.
• If DVOL keeps rising and block/combo stays net bought, short-end volatility can still expand.
• A return above 4h EMA20/50 would be the cleaner sign that repair is more than just a bounce.