GLOBAL MARKETS-Shares rally on U.S. tech earnings, ECB purchase plans

* Wall Street higher on Apple (NasdaqGS: AAPL - news) , Texas Instruments (NasdaqGS: TXN - news) results

* European shares surge on report ECB to buy corporate bonds

* US Treasury prices, euro fall

* China GDP data weighs on Chinese shares

(Adds close of European stock, bond markets)

By Sam Forgione

NEW YORK, Oct 21 (Reuters) - A measure of global equity

markets advanced on Tuesday after technology earnings lifted

U.S. shares and the prospect of European Central Bank corporate

bond purchases boosted European stocks and weighed on safe-haven

U.S. Treasuries prices.

A rally in shares of Apple Inc and Texas

Instruments Inc after stronger-than-expected quarterly

earnings reports lifted the tech-heavy Nasdaq index more than 1

percent and helped put the S&P 500 on track for a fourth

straight session of gains, while European shares gained on a

Reuters report that the ECB was readying a plan to buy corporate

bonds.

A selloff in Coca-Cola shares after disappointing

results limited the Dow's gains, however. U.S. corporate

earnings season will ramp up this week, with nearly 130 S&P 500

companies scheduled to report.

"This was strong across all sectors, and Apple gave a good

guidance. Any fund manager who is underweight on Apple is

probably rethinking that position today," said Michael Binger,

senior portfolio manager at Minneapolis-based Gradient

Investments, which owns Apple stock.

U.S. data showed existing home sales rose 2.4 percent in

September to their highest level in a year.

The report that the ECB is considering buying corporate

bonds sparked a rally in the shares of peripheral European

countries and led the broader gains in European stocks. The news

also sent low-risk U.S. Treasuries prices lower and hurt the

euro.

"It increases the potential scale of the purchases the ECB

will be able to make if they extend out into the corporate bond

market," said Lee Hardman, a strategist with Bank of

Tokyo-Mitsubishi in London.

Official data showing China's gross domestic product grew

7.3 percent in the third quarter from a year earlier, marking

the weakest growth since the first quarter of 2009, weighed on

Chinese shares and stoked concerns over global economic growth.

MSCI (NYSE: MSCI - news) 's all-country world index was last up

1.14 percent at 404.49, while the FTSEurofirst 300 index

of top European shares closed up 2.09 percent at

1,299.26.

The Dow Jones industrial average was last up 0.97

percent at 16,558.65, while the S&P 500 was up 1.47

percent at 1,931.96 and the Nasdaq Composite was up 1.69

percent at 4,388.99.

The dollar index, which tracks the greenback versus a

basket of six currencies, was up 0.32 percent at 85.228.

Benchmark 10-year U.S. Treasury notes were last down

5/32 to yield 2.2 percent.

Brent crude was last up $0.49, or 0.57 percent, at

$85.89 a barrel. U.S. crude was last up $0.04, or 0.05

percent, at $82.75 per barrel.

(Additional reporting by Marc Jones and Patrick Graham in

London and Ryan Vlastelica and Richard Leong in New York;

Editing by Cynthia Osterman)