* Dollar recovers from 15-mth low as market digests Bernanke
* China's Hu makes no mention of yuan after Obama meeting
* Dlr supported by waning risk appetite; commodity FX fall
(Updates prices, adds quotes)
By Jamie McGeever and Jessica Mortimer
LONDON, Nov 17 (Reuters) - The dollar rebounded on Tuesday from Monday's 15-month lows after Federal Reserve Chairman Ben Bernanke made rare comments about the dollar, encouraging traders to trim longer-term bets against the currency.
Bernanke surprised investors on Monday when he said the central bank was "attentive to implications of changes in the value of the dollar", although he reiterated that interest rates would remain exceptionally low for an "extended period".
Some interpreted his remarks on the dollar, which is usually the purview of Treasury, as a sign the Fed is worried further depreciation could stoke inflation. [
]"He was trying to emphasise to the market what Fed thinking is going into the last few months of the asset purchase scheme," said Societe Generale senior currency strategist Peter Frank.
He said the dollar remained in a longer-term downtrend and that Bernanke's remarks were probably aimed more at "smoothing" its decline than reversing it. He added that traders were "a little uncomfortable" being long of euros above $1.50.
The dollar also benefited as investors trimmed exposure to risk, with equity, oil and gold prices all lower, gaining particularly against commodity-linked currencies such as the Australian <AUD=D4> and Canadian dollars <CAD=D4>.
"People are paring back on risk after we had a 'risk-on' day yesterday," said UBS currency strategist Geoffrey Yu.
He added that Bernanke's comments, and those of some other policymakers, were probably not enough to give the dollar a lasting lift without "having China on board" too.
European Central Bank President Jean-Claude Trichet also spoke on currencies on Tuesday, reiterating his view that a strong dollar is in the U.S. interest and that the euro was never intended to be a reserve currency. [
].At 1238 GMT the dollar index <.DXY> was up 0.6 percent on the day at 75.399, after striking a 15-month low of 74.679 on Monday.
The euro <EUR=> fell 0.7 percent to $1.4866. The single currency hit a high of $1.5015 on Monday but has struggled to hold above $1.50. Traders said it was weighed down early on by profit booking and options-related selling around that level.
It was in the middle of the $1.48-$1.51 range which they said marked a large "double-no-touch" options structure that rolls off on Friday.
The dollar was up 0.2 percent against the yen at 89.33 yen <JPY=>, recovering from 88.74 yen earlier in the day, its lowest in just over a month.
U.S. data may get attention later, with producer prices, industrial production and pending home sales due. <ECONUS>
FED RHETORIC
Bernanke's comments on Monday came as U.S. President Barack Obama was in China, although few expect the visit to result in any near-term changes in Beijing's foreign exchange policy.
Chinese President Hu Jintao did not mention the yuan after meeting Obama, who only said he was pleased with China's commitment to move toward a more market-oriented exchange rate. [
]For the dollar to reverse its long-term downtrend, analysts say China needs to take steps towards a more flexible currency regime, or the Fed has to signal imminent rate hikes.
"Neither of those prerequisites have been fulfilled, so the controlled, grinding lower of the dollar will continue," Javeus said Johan Javeus, strategist at SEB in Stockholm.
Sterling gained versus the euro after data showed UK inflation jumped [
], and on a press report that Italian chocolatier Ferrero might be considering an offer for an alliance with Britain's Cadbury <CBRY.L>. [ ]The euro was down 0.4 percent at 88.61 pence <EURGBP=>, having hit a two-month low of 88.49 pence.