UPDATE 1-Russian rouble stabilises vs dollar on eve of monthly tax payments

(Updates at 1350 GMT)

MOSCOW, Nov 27 (Reuters) - The Russian rouble stabilised on Monday, hovering not far from last week's multi-month high, still supported by exporters' foreign currency sales and high interest rates.

By 1350 GMT the rouble was steady against the dollar at 88.59 and unchanged at 97.09 against the euro . Against the yuan, it had firmed 0.2% to 12.36 .

The rouble showed limited reaction to the central bank's plan to resume domestic foreign exchange market interventions from January 2024, but with an adjusted formula that analysts said would likely support the Russian currency.

The rouble has strengthened against the dollar for seven weeks in a row. It could reach the 85 mark this week, said Alor Broker's Alexei Antonov, but could then struggle.

"December has always been a bad month for the rouble," Antonov said.

Financial liquidity usually increases at the end of the year, he said, due to the budget payments being finalised and many people buying foreign currency to spend the New Year holidays abroad.

The rouble has firmed from beyond 100 since last month's announcement of a presidential decree requiring some exporters to convert a significant portion of foreign exchange revenue.

Month-end tax payments, due on Tuesday, are also supporting the Russian currency.

Kremlin aide Maxim Oreshkin last week said the reduction in capital outflows had helped the rouble to rebound, along with a stabilising balance of payments. Strong consumer demand could limit a further rise in the currency, he said.

Meanwhile, the Bank of Russia's interest rate hike to 15% in late October has also buttressed the currency. The bank, which has signalled that another increase may be needed before it can start lowering the cost of borrowing, is due to meet on Dec. 15.

Brent crude oil, a global benchmark for Russia's main export, was down 0.8% at $79.88 a barrel, slipping as investors awaited an OPEC+ meeting this week for a potential agreement to curb supplies into 2024.

Russian stock indexes were lower.

The dollar-denominated RTS index was down 0.5% at 1,137.1 points while the rouble-based MOEX Russian index was 0.6% lower at 3,197.6 points.

Shares in SPB Exchange were down 9.5%, recovering slightly from slumping to a record low earlier in the session after it was forced to deny reports that it had filed for bankruptcy. (Reporting by Reuters Writing by Alexander Marrow Editing by David Goodman and Sharon Singleton)