PRECIOUS-Gold down, hopes for imminent cenbank actions fade

* Markets disappointed by lack of firm ECB, Fed actions

* Supported by South Korea boosting gold reserves by 16 T

* India demand could weaken further on lack of monsoon rain

(New details throughout, updates comment, changes byline,

dateline, previously LONDON)

By Frank Tang

NEW YORK, Aug 2 (Reuters) - Gold prices fell for a fourth

straight session on Thursday as bullion investors continued to

unwind bullish bets due to a lack of more aggressive actions by

the European Central Bank and U.S. Federal Reserve to boost

growth.

ECB President Mario Draghi said any government bond buying

would not come before September - and only if governments

activated the euro zone's bailout funds to join the ECB in

buying bonds.

Gold fell in tandem with losses on Wall Street and U.S.

crude futures, as markets across the board looking for monetary

stimulus were less than impressed. Just last week, Draghi said

the ECB would do whatever it takes to preserve the euro.

The bullion market was already under pressure a day after

the Federal Reserve issued a policy statement that dashed

investor hopes for new monetary stimulus, even though it

acknowledged that the U.S. economy has lost momentum.

"It appears that central banks now need more economic data

for them to come out with more aggressive actions, and that's

disappointing for gold investors," said Phillip Streible, senior

commodities broker at futures brokerage R.J. O'Brien.

"But the downside on all these precious metals markets are

limited as there is a stimulus-put built onto prices," said

Streible, referring to lingering hopes for easing if economic

conditions worsen.

Spot gold fell 0.8 percent to $1,585.75 an ounce by

2:29 p.m. EDT (1829 GMT), having earlier hit a one-week low of

$1,587.80.

U.S. COMEX gold futures for December delivery settled

down $16.60 an ounce at $1,590.70, with trading volume around 10

percent below 30-day average, preliminary Reuters data showed.

SOUTH KOREA BUYS GOLD

South Korea said late on Tuesday that it bought 16 tonnes of

gold in July, its second purchase this year. It is one of a

number of countries, mostly in Asia and emerging markets, to

have built reserves recently.

UBS said in a note that central-bank activity is in part

filling in for the tame retail physical-buying from top bullion

consumer India by inserting a price floor to gold's downside.

Physical buying from India remains weak, and farmers there

are likely to have less discretionary income to buy gold after

weather forecast predicted the country's monsoon rains will be

deficient in 2012.

Among other precious metals, silver fell 1.1 percent

to $27.09 an ounce, while platinum was down 2 percent at

$1,380.24 an ounce and palladium dropped 3.4 percent to

$566.75 an ounce.

2:29 PM EDT LAST/ NET PCT LOW HIGH CURRENT

SETTLE CHNG CHNG VOL

US Gold DEC 1590.70 -16.60 -1.0 1586.30 1618.80 144,458

US Silver SEP 26.995 -0.540 -2.0 26.880 27.780 41,068

US Plat OCT 1387.80 -13.50 -1.0 1382.70 1415.40 6,959

US Pall SEP 567.85 -14.75 -2.5 562.35 589.10 2,605

Gold 1585.75 -12.84 -0.8 1585.45 1614.29

Silver 27.090 -0.310 -1.1 27.010 27.800

Platinum 1380.24 -28.66 -2.0 1386.25 1402.25

Palladium 566.75 -19.88 -3.4 569.75 585.25

TOTAL MARKET VOLUME 30-D ATM VOLATILITY

CURRENT 30D AVG 250D AVG CURRENT CHG

US Gold 155,763 171,814 193,042 18.89 -0.95

US Silver 47,154 52,119 57,575 30.08 1.55

US Platinum 7,146 9,723 8,969 23 0.00

US Palladium 2,773 3,198 4,357

(Additional reporting by Jan Harvey in London; Editing by

Marguerita Choy)