* Dismal earnings from Alcoa and Illumina hit Wall St
* US 10-year bond yield near 4-month high on Fed, inflation
* Dollar rises to 7-month high
* Pound bounces back from low in volatile trade
* European shares seen steady to slightly higher
By Hideyuki Sano
TOKYO, Oct 12 (Reuters) - Asian shares hit three-week lows on Wednesday after a dour start to Wall Street's earnings season knocked U.S. stocks, while the dollar and Treasury yields were at multi-month highs on growing expectations of a U.S. interest rate hike in December.
The British pound jumped back from lows in a volatile trading session, though concerns about a damaging "hard Brexit" are likely to keep the currency under pressure.
European shares were expected to be steady to slightly higher, with spread-betters looking for a rise of 0.2 percent in Germany's DAX, a 0.1 percent gain in France's CAC and a flat opening in Britain's FTSE.
MSCI's broadest index of Asia-Pacific shares outside Japan fell 0.4 percent, while Japan's Nikkei futures slipped 0.9 percent.
On Wall Street, the S&P 500 Index fell 1.2 percent to a near one-month low, and dipped below its 100-day moving average - seen as a major support - for the first time since June.
Shares of aluminium producer Alcoa tumbled 11.4 percent and diagnostics test maker Illumina plummeted 24.8 percent following their disappointing earnings, casting a pall over the market.
Also undermining risk sentiment were rises in global bond yields.
"Rising bond yields will be a major market theme in coming three months or so. For one, there's speculation that central banks in both Europe and Japan could start tapering," said Yoshinori Shigemi, global market strategist at JPMorgan Asset Management.
"Inflation expectations are rising because of oil and U.S. wage growth. We don't expect oil prices to hit $80 or $90, but even if they stay around $50, that's about 10 percent above their levels last year, thus putting inflationary pressure."
Investors are growingly convinced that the U.S. Federal Reserve will raise interest rates in December while avoiding a hike at its next meeting less than a week before the U.S. presidential election.
The 10-year U.S. Treasuries yield rose to 1.781 percent on Tuesday, its highest level since early June, and last stood at 1.778 percent.
U.S. interest rate futures are pricing in about a 75 percent chance of a rate hike by December, little changed over the past couple of days.
"The markets had relied on expectations of monetary stimulus for a long time but that is changing with bond yields rising around the world. You have rising interest rates and falling EPS. That's obviously bad for stocks," said Norihiro Fujito, senior investment strategist at Mitsubishi UFJ Morgan Stanley Securities.