HONG KONG, July 4 (Reuters) - Hong Kong's central bank, the Hong Kong Monetary Authority, injected HK$3.875 billion ($500 million) into the money market in New York trading on Friday to stem an appreciating Hong Kong dollar and keep it within its fixed trading band.

According to data on Reuters page, the latest intervention will lift the aggregate balance -- the sum of balances on clearing accounts maintained by banks with the HKMA -- to HK$215.009 billion by July 7.

The Hong Kong dollar has been boosted by strong capital inflows into the territory in recent weeks, partly attracted by initial public offerings, dealers said.

The Hong Kong dollar is pegged at 7.80 to the U.S. dollar but can trade between 7.75 and 7.85. Under the linked exchange rate mechanism, the HKMA is obliged to intervene in the market to keep the trading band intact if the currency hits 7.75 or 7.85.

It was traded at HK$7.7495/02 in late Friday trade.

($1=HK$7.749)

(Reporting by Alison Leung; Editing by Alex Richardson)

((alison.leung@thomsonreuters.com; +852 2843 6369; Reuters Messaging: alison.leung.reuters.com@reuters.net)) Keywords: HONGKONG/HKMA

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