Mainland equities face a catch-up risk at the open, with the holiday week bringing higher global bond yields, a Fed leaning towards further hikes and fresh Gulf supply risk, all of which argue for a cautious start. Southbound Stock Connect flows are the key swing factor for Hong Kong, where mainland buying has often cushioned sell-offs and was absent for the whole holiday. For gold, the reopening of Shanghai trading restores a major source of physical demand, and the size of the local premium will show whether Golden Week revived buying. Energy-sensitive and rate-sensitive sectors look most exposed, while any strength in holiday consumption data would support consumer names.---Mainland investors return from a week off to find the world has moved without them: yields higher, the Fed more hawkish, the Gulf more dangerous and Hong Kong already bruised.Summary:Shanghai and Shenzhen reopen on Thursday 8 October at 09:30 Beijing time (0130 GMT) after the 1-7 October National Day holiday; Stock Connect resumes in both directionsBefore the break, the Shanghai Composite closed around 3,840 on 30 September, with a muted response to Beijing's latest support package and a sharp tech hardware sell-off on 28 SeptemberHong Kong slumped 2.6% on 2 October, its steepest fall since March, as it caught up with a global bond sell-off without mainland buyers, then partly recoveredThe Shanghai Gold Exchange also reopens; Golden Week traditionally marks the start of China's peak gold-buying season, and the local premium was at a three-month high before the holidayCiti described early Golden Week consumption data as underwhelming; official travel and spending figures are still to comeGlobal backdrop: Fed minutes show most officials see another hike likely by year end, US consumer inflation expectations jumped, and a tanker was struck off QatarMainland Chinese financial markets reopen on Thursday after the week-long National Day holiday, with investors returning to a global backdrop that shifted considerably during their absence. The Shanghai and Shenzhen stock exchanges resume trading at 09:30 Beijing time (0130 GMT, 9.30pm US Eastern on Wednesday), and Stock Connect trading with Hong Kong restarts in both directions after being suspended since 1 October.Before the break, mainland stocks were subdued. The Shanghai Composite rose about 0.3% on 30 September to close around 3,840, reflecting a muted response to Beijing's latest support measures. Earlier that week, on 28 September, technology hardware shares sold off sharply, with the ChiNext index falling about 4.5%, after optical transceiver makers were named in new US legislation targeting Chinese-made components in AI data centres.Hong Kong gave mainland investors a preview of what they missed. The Hang Seng Index fell 2.6% on 2 October, its biggest one-day drop since March, as it reopened after its own National Day holiday and caught up with a global bond sell-off. Financials led the decline, and disappointment over Chinese stimulus added to the pressure. The index then recovered part of the loss, rising about 1% on 6 October to around 24,300, although turnover stayed light without southbound buying.Global conditions have also tightened. Minutes of the Federal Reserve's September meeting, released on Wednesday, showed most policymakers see another rate increase as likely before year end, while US consumers' one-year inflation expectations rose to their highest since May 2023. A tanker attack north of Qatar has added to energy supply risks in the Gulf.Gold will be a focus as the Shanghai Gold Exchange reopens. The World Gold Council has noted that Golden Week traditionally marks the start of China's peak gold-buying season, although high prices and weak consumer confidence dented jewellery demand earlier this year. The Shanghai premium over London reached its widest in three months just before the holiday. Beijing has also continued to curb speculation, with authorities reportedly ordering major banks to halt leveraged retail gold derivative products ahead of the break.Consumer spending during the holiday is another test. Citi analysts said early Golden Week data looked underwhelming, with spending per traveller likely softer despite steady visitor numbers. Official figures, along with the scale of southbound flows into Hong Kong, will shape sentiment as the session unfolds. This article was written by Eamonn Sheridan at investinglive.com.