〔Overnight Brief〕Three Global Banks Now Price September AND December Hikes After Warsh; Largest US Equity Outflow Since March Hits Ahead of Nvidia Week - Inflation Print Decides

0. Weekly Arc

The Jackson Hole repricing crystallized overnight into a uniform bank call: Barclays, Société Générale, and Deutsche Bank now expect Fed hikes in both September and December ^[1][2], and Continuum Economics reads Chair Kevin Warsh's Jackson Hole speech as making September tightening likely ^[3]. The shift is showing up across asset behavior - US equity funds recorded their largest weekly outflow in five months for the week to August 26, ahead of Nvidia earnings and the Fed event ^[4] - while Morgan Stanley's Andrew Slimmon says the rate-hike threat is now rotating equity-market leadership ^[5]. The July PCE backdrop reinforces the case at +3.7% y/y vs +3.6% expected ^[6]; the remaining gap is conviction on the inflation path itself, per JPMorgan Private Bank's Sitara Sundar ^[7].

1. Policy Narrative

• **[NEW] Three-bank alignment on a two-hike path:** Barclays, Société Générale, and Deutsche Bank all expect Fed moves in September AND December ^[1][2]. The uniformity across European and US desks is the development; previously this was a coin-flip.
• **[NEW] Continuum Economics:** September FOMC tightening looks likely after Chair Warsh's Jackson Hole speech ^[3].
• **[NEW] Breakingviews:** frames the Fed as telling investors to "play the ball with two refs" - a divided Committee requiring two-way hedging ^[8].
• **[ONGOING] Kenneth Rogoff (Harvard, former IMF chief economist), at Jackson Hole:** warned that the US fiscal trajectory may need a major crisis to force reform, and that "rates have reversed but the US has not" ^[9].
• **[NEW] JPMorgan Private Bank's Sitara Sundar:** markets focused on gaining clarity on inflation via the Warsh speech ^[7].

2. Key Data and Market Read

• **[NEW] US equity fund outflows (week to Aug 26):** largest weekly outflow in five months, with investors reassessing AI exposure ahead of Nvidia earnings and awaiting Warsh's Jackson Hole remarks ^[4].
• **[NEW] Leadership rotation:** Morgan Stanley's Andrew Slimmon says the threat of a rate hike is causing a change in leadership in equity markets; he described himself as "happy" with what Warsh said ^[5].
• **[ESCALATED] July US PCE (per Yuanda weekly recap):** headline +3.7% y/y vs +3.6% expected, +0.2% m/m; broker flags rising "overseas liquidity expectations" volatility ^[6]. The figure and consensus are repeated, but the policy read is the broker's, not a primary release.
• **[ONGOING] A-share weekly review (Yuanda):** Shanghai Composite +1.20%, Shenzhen Component -1.00%, ChiNext -3.42%, STAR 50 -2.03%; value outperformed, tech under pressure; top sectors agriculture/forestry/fishery (+6.46%), coal (+5.13%), non-bank financials (+3.94%) ^[6].

3. Cross-Asset and China Reads

• **[NEW] China A-shares (Datong Securities, Aug 27 close):** Shanghai +1.13% to 3,956.57, Shenzhen Component +1.50% to 14,048.88, ChiNext +1.71% to 3,473.35; turnover exceeded RMB 2.1 trillion; electronics, communications, building materials led; banks, power equipment, home appliances lagged ^[10].
• **[NEW] Beijing Stock Exchange (Dongguan, weekly):** BSE 50 -0.04% for the week, lagging Shanghai (+1.32%) and STAR 50 (+2.41%); daily turnover averaged RMB 13.852 billion (-14.76% w/w); turnover ratio 1.51% (-0.27 percentage points w/w); PE (TTM) ticked up to 41.37x from 40.65x ^[11].
• **[ONGOING] Beijing Stock Exchange 2026 H2 outlook (Dongguan):** 331 listed firms, roughly 4x the opening count; ~97.8% of 2026 IPOs are "little giant" specialized firms; the BSE 50 and Specialized SME indices sit at historical PE (TTM) percentiles of ~5.1% and ~4.7% respectively, with 2026 YTD drawdowns of -24.5% and -21.4% ^[12].
• **[ONGOING] Guoxin Securities policy tracker:** the State Council on Aug 21 deployed next-generation communications network build-out and accelerated clearing of arrears owed to enterprises; the NDRC and a logistics-network implementation plan were issued on Aug 27 ^[13].

4. Contrarian and Tail Risks

• The three-bank call is uniform but rests on a single speech; JPMorgan's Sundar flags that markets are still seeking concrete inflation clarity ^[7], and a soft August CPI/PCE would break the convergence. Treat the two-hike call as a base case, not a base rate.
• The equity outflow figure is a flow print, not a positioning print - it captures redemptions, not gross exposure ^[4]. The leadership-rotation claim from Morgan Stanley's Slimmon is a single sell-side view ^[5].
• Rogoff's crisis-driven fiscal reform warning is a long-horizon view sourced at a single conference; the "Asian water tower" Tibetan Plateau study in Nature Communications flags a slow-burn climate tail risk, with a catastrophic Nepal-China border flash flood landing days after publication ^[9][14].
• Source quality: the BSE weekly figures and Guoxin policy tracker are broker recaps rather than primary exchange or government releases ^[13][11]; the July PCE print and the +3.6% consensus arrive via a Chinese-brokerage weekly, so treat as second-hand ^[6].