* Rouble hits 14-month peak vs euro then fades * MOEX stock index slips from all-time high * No OFZ bond auctions this week, says FinMin * Global volatility impacting Russian market (Updates prices, adds analyst comment) MOSCOW, Sept 28 (Reuters) - The rouble fell from a 14-month peak versus the euro and into negative territory on Tuesday as oil prices edged lower and Russia’s benchmark MOEX stock index slipped from an all-time high amid heightened volatility on global markets. Against that shifting backdrop, Russia’s Finance Ministry said it would not hold weekly OFZ bond auctions on Wednesday, as it contemplated yields climbing higher, which implies Russia would have needed to offer a premium to the market to borrow successfully. OFZ bond yields were near their highest since early June amid talk of more U.S. sanctions against Russian debt and high inflation, which could lead the central bank to raise interest rates again as soon as next month. By 1451 GMT, the rouble traded at 85.07 euros , down 0.3%, after earlier touching 84.5775, its strongest since July 28, 2020. Against the dollar, the rouble was 0.4% weaker at 72.83 . A “great rotation” on the global market that could last from now until the end of the year is causing tech companies’ value to go down and pushing U.S. Treasuries higher, said Iskander Lutsko, chief investment strategist at ITI Capital. Brent crude oil, a global benchmark for Russia’s main export, was down 0.6% at $79.08 a barrel, earlier crossing the $80 threshold for the first time since October 2018, levels likely to be breached again this year. VTB Capital said rising oil prices could send the rouble to around 72 versus the dollar, “should international portfolio inflows in Russian assets remain on track.” Russian stock indexes also fell, reversing earlier gains. The rouble-based MOEX Russian index was 0.4% lower at 4,066.8 after hitting yet another record high of 4,112.31. The dollar-denominated RTS index was down 0.9% at 1,758.4 points, after earlier touching 1,788.01 points, its strongest since August 2011. Shares in Gazprom, already lifted by the completion of the Nord Stream 2 gas pipeline, climbed 0.9% to levels last seen in May 2008 after Hungary signed a long-term gas supply deal with Russia. For Russian equities guide see For Russian treasury bonds see Editing by Steve Orlofsky and Mark Potter Our Standards: The Thomson Reuters Trust Principles.