Original analysis.
No wasted motion.

WTI fell 7.9% in the week to 25 September while Brent rose, opening the widest gap since May. Why the benchmarks split, why Indonesia's ICP tracks Brent, and what that means for the subsidy bill, the current account, and the rupiah.

In early June, Bitcoin, the IDX, and the rupiah capitulated together and bounced together — the live stress test of our cross-vertical correlation thesis. What the synchronized selloff confirmed, and why the relief rally is not the all-clear.

Tracing the single transmission chain — crude to US inflation to the dollar to the rupiah to the IDX and crypto — that the spring 2026 energy shock drove through every Indonesian retail portfolio, and asking which links break first.

Bank Indonesia held at 5.75% and cut hedging costs instead of hiking. The rupiah gave back its bounce the next day and firmed only when crude fell. Why the currency trades on Brent, not the policy rate.

Holding IDX equities, Bitcoin, and rupiah cash feels like diversification. In June 2026 all three capitulated and bounced together — why, in the drawdown that actually destroys capital, they are one trade.

Bank Indonesia's off-schedule hike to 5.50% was called decisive. It was an admission — why an emergency rate move signals that the rupiah, not the central bank, is setting policy.

The comforting story is that foreigners panic and locals have the edge. When the shock is imported — oil, the Fed, the dollar — the foreign exit is reading the right macro.

The Iran–Israel war gave the digital-gold thesis its cleanest test in years. Bitcoin fell with the conflict, not against it — why crypto is a liquidity bet, not a geopolitical hedge.

Indonesia exports coal, palm oil, and nickel — so high prices must be good for it, the reflex goes. In 2026 the inflation-and-rupiah channel beats the export-earnings story when crude spikes.

Indonesia has 20 million stock accounts and 21 million crypto investors — and most barely trade. Why account counts overstate participation, and dormancy is the real story.

Brent +2.4% to $104.72, BTC −2.3% to $82,561, 10-year peaks at 5.31%, JCI +0.94% to 6,094.

WTI −1.6% to $91.11, Brent $102.25, BTC +0.5% to $84,508, payrolls +29k, JCI −3.28% to 6,037.

WTI −7.9% while Brent holds $104, BTC +4.0% to $84,096 after an $87k high, BI holds at 5.75%, JCI −3.09% to 6,241.

First Fed hike since 2023, Clarity Act fails 49–50, BTC still +4.8% to $80,895, JCI −1.53% to 6,441.

WTI above $100, Saudi East-West pipeline shut, a Fed hike fully priced, BTC $77,216, JCI 6,541.

WTI +9.7% as the tanker war resumes, payrolls +162K push BTC back under $80k, JCI +1.82% to 6,636.

Iran–Oman Hormuz lane cuts Brent 5.4%, Warsh lifts hike odds to ~60%, BTC holds ~$78k, JCI flat at 6,518.

BTC +24% to $78,335 on the Clarity Act push, Brent +6.6% to $94.39 as the MoU expires, JCI +1.93% to 6,526.

No Hormuz deal, blockade "indefinite", Brent +6% to $88.52, BTC $62,993, JCI flat after MSCI drops CPIN and GOTO.

WTI −7.7% on Hormuz deal hopes, payrolls −23K lift BTC above $65k, JCI +2.78% to a three-month high.

Fed holds with three dissents, Brent +24% in July, BTC ~$64k, JCI 6,236 as the rupiah posts a ninth monthly loss.

Brent tops $100, BTC holds $65k through an oil spike and a Mag 7 rout, BI holds at 5.75%.

Brent +16% to $88.10 on Iran escalation, CPI 3.5% lifts then fades BTC, JCI +4.24% to 6,176.

US–Iran ceasefire collapses, Brent +5% to $76, BTC +4.2% near $64k, JCI 5,924 as the rupiah crosses 18,000.

Oil flat near pre-war levels, weak payrolls lift BTC back above $61k, JCI round-trips to 5,876.

Brent −10.9% as Hormuz reopens, BTC below $60k, JCI −4.55% after MSCI's frontier warning.

US–Iran deal deflates crude, BTC range-bound in the mid-$60ks, JCI +2.8% into the MSCI review as BI hikes to 5.75%.

US–Israel strikes on Iran sent WTI to ~$85 and US CPI to a 4.2% three-year high, drove the JCI to six-year lows and the rupiah to a record 18,234 (forcing an emergency Bank Indonesia hike to 5.5%), then a late-week de-escalation sparked a relief rally.

Fresh US–Israeli strikes on Iran turn crude back up to $90.54, Bitcoin capitulates 17% to $60,922, and the IDX crashes to a six-year low of 5,594 with the rupiah at a record 18,234 — forcing an emergency Bank Indonesia hike to 5.50%.

Crude slides 9.6% to $87.36 as demand worry joins the war premium, Bitcoin's fifth straight down week brings it to $73,372, and the rupiah presses toward records at 17,816 in an 11-week slide that has Bank Indonesia cornered.

Crude whipsaws 8.4% lower to $96.60 yet risk keeps falling — Bitcoin cracks its $78–80k shelf to $75,488 on macro deterioration, and the IDX bleeds to 6,162 with the rupiah weakening to 17,678 despite Bank Indonesia's hike.

The Iran blockade flares and WTI gaps 10.5% to $105.42, Bitcoin slips to $79,066 as the oil-to-rates channel bites, and the IDX slides while the rupiah weakens to 17,587 — with Bank Indonesia hiking 50bp to 5.25%.

Crude's fear premium eases below $100 (WTI $95.42), Bitcoin prints a spring high at $80,187 on a softer dollar, and the IDX slips below 7,000 to 6,969 as the rupiah grinds to fresh lows ahead of a Bank Indonesia hike.

The 2026 Iran war and its mid-April blockade keep crude above $100 (WTI $101.94), Bitcoin holds firm near $78k as a partial geopolitical hedge, and the rupiah grinds weaker toward 17,300 as the oil bill squeezes Indonesia.