SSE Composite Index

The SSE Composite Index has shown a sustained rally driven by policy support and inflows from long-term investors, with no verified marginal change in the latest 24 hours. The dominant tension remains whether these supportive measures can continue to outweigh potential headwinds. The high-probability scenario is a continued rally due to persistent policy support and improving investor confidence, suggesting a long position bias.

The resolution mechanics dominate every fundamental consideration here. The Shanghai Stock Exchange's official announcement (published 2026-09-15) closes the market from Thursday 2026-10-01 through Wednesday 2026-10-07 for National Day, with trading resuming only on Thursday 2026-10-08. Because the contract takes the open of the 2026-09-30 bar and the last valid close on or before 2026-10-07, the entire seven-calendar-day window collapses into a single intraday session: the open-to-close return of Wednesday 2026-09-30, the last trading day before Golden Week. Overnight gaps are excluded by construction, which further compresses the realized dispersion. The structural regime is a genuine two-sided tension: domestically, the 2026-09-28 State Council executive meeting deployed a batch of incremental counter-cyclical measures (accelerated bond issuance, activation of roughly RMB 3.2tn of unused local-government debt quota, property-stabilisation research, and flexible use of monetary tools, with sell-side analysts penciling in a Q4 RRR and policy-rate cut), while externally the effective closure of the Strait of Hormuz, Brent above USD 100, the Fed's 2026-09-16 hike to 3.75-4.00% with a further hike signalled by sixteen of eighteen participants, and US 10-year yields near 5.26% (highest since 2007) are compressing growth-equity valuations. That tension produced a violent risk-off session on 2026-09-28 (index -1.67%, ChiNext -4.53%) followed by only a shallow stabilisation on 2026-09-29. The last 24 hours did produce marginal changes, but they roughly offset: oil retreated as US-Iran indirect talks continued, which is mildly supportive for a large net oil importer, while Shanghai-Shenzhen turnover shrank to RMB 1.409tn, the thinnest since 2025-07-08, confirming a pre-holiday liquidity vacuum. Neither reverses the mainline. For the single session that resolves this contract, the September official PMI print (due 09:30 CST on 2026-09-30, consensus near the 50 expansion line), quarter-end window dressing, and broad broker advice to hold stock into the break argue for a small positive drift; holiday-gap risk aversion given the live Hormuz conflict argues the other way. Critically, the historically powerful post-holiday effect cited by brokers (Wind All-A averaging +1.69% in the week after National Day with a 79% hit rate, 2011-2025 ex-2024) lands on 2026-10-08 and later, entirely outside this resolution window, so it cannot be traded through this contract. A thin, pre-holiday, quarter-end session clearing more than +/-1.00% open-to-close is the exception rather than the rule. The appropriate position bias for the contract week is NEUTRAL.

Structural mainline: the 2026 National Day closure for the Shanghai exchange runs 1–7 October (reopening 8 October), and 30 September is the last trading session before the holiday. Under the resolution rule the 'seven-day' return equals the 30 September open-to-close move — a single session, not seven trading days. The regime is a pre-holiday, record-thin, de-risking tape: on 29 September A-share turnover hit a new year-to-date low, with brokers debating 'hold cash vs hold stocks' over the break. That is the latest-24h marginal change: it reinforces rather than reverses the range-bound mainline. The dominant tension is whether holiday de-risking plus any September data (NBS manufacturing PMI) can push that one session beyond ±1%. With no verified major catalyst and extreme thinness, a sub-1% single-day move is the modal outcome, so a NEUTRAL bias is appropriate.

The seven-day forecast window from Sep 30 to Oct 7 contains only one A-share trading day on Sep 30 due to the National Day holiday (Oct 1–7). The key scheduled catalyst is China's September PMI release on the morning of Sep 30. The core tension is pre-holiday capital risk reduction versus existing domestic policy stabilization expectations. The baseline case expects PMI to match market consensus, leading to muted intraday movement within the -1.00% to +1.00% return band, supporting a NEUTRAL position bias. Upside and downside large-move scenarios are conditional on PMI surprises and carry lower probabilities.