FACTBOX-How Russian authorities are dealing with market crisis

(Reuters) - Russian authorities on Tuesday unveiled plans to lend 950 billion roubles (20.7 billion pounds) to key banks in subordinated loans, taking the value of their markets rescue package announced so far to around $216 billion.

Following is a summary of measures announced so far.

CORPORATE DEBT

-- State-owned Vneshekonombank (VEB) will offer companies and banks up to $50 billion over this year and next to help them refinance foreign debt taken out before September 25

-- VEB will get the money in foreign currency via the central bank, from Russia's $560 billion gold and forex reserves

-- There will be changes to legislation regarding foreign loans taken out via offshore firms as well as directly, parliamentary sources say.

TAX CUTS

-- Oil export duty cut to $372 per tonne from October, down from the previously announced $485.5, in a move which the Finance Ministry says will save oil companies $5.5 billion

-- Sales of shares held for a period of over one year will be exempt from profit tax