UPDATE 1-China August yuan loans surprisingly strong, M2 growth at new low

(Adds details, comments)

* August new loans 1.09 trln yuan, vs f'cast 900 bln yuan

* August M2 money supply up 8.9 pct y/y, vs f'cast 9.1 pct

* August TSF 1.48 trln yuan, vs July's 1.22 trln yuan

BEIJING, Sept 15 (Reuters) - Chinese banks extended more credit than expected in August, buoyed by demand from home buyers and companies, but there are signs that credit growth may have reached a peak as tighter monetary conditions filter into the broader economy.

Beijing is trying to reduce financial risks by containing rising debt and defusing property bubbles amid fears they could derail the world's second-largest economy, although policymakers are seen treading warily before a key party meeting next month.

Chinese banks extended 1.09 trillion yuan ($166.5 billion) in net new yuan loans in August, central bank data showed on Friday, well above analysts' expectations.

Analysts polled by Reuters had predicted new yuan loans of 900 billion yuan, up from 825.5 billion yuan in July.

"Today's data are consistent with our view that, having reached a peak during the current business cycle in mid-2016, broad credit growth is now on a downward trajectory," Julian Evan-Pritchard, Capital Economics' China economists, said in a report.

Household loans, mostly mortgages, rose to 663.5 billion yuan in August from 561.6 billion yuan in July, according to Reuters calculations based on the central bank's data.

Household loans accounted for 61 percent of total new loans last month, down from 68 percent in July.

Corporate loans climbed to 483 billion yuan in August from 353.5 billion yuan in July.

Broad M2 money supply (M2) in August grew 8.9 percent from a year earlier, hitting a fresh low since records began in 1996 and missing forecasts for an expansion of 9.1 percent and compared with July's 9.2 percent.

China's central bank has said that the slowing M2 growth could be a "new normal" due to the stepped-up crackdown on risky shadow lending activities.

Total social financing (TSF), a broad measure of credit and liquidity in the economy, rose to 1.48 trillion yuan in August from 1.22 trillion yuan in July, the data showed.

Some economists had expected an increase in the TSF to 1.3 trillion yuan.

In its second-quarter policy report, the central bank said it would strike a balance between deleveraging and maintaining stable liquidity, suggesting policymakers were keen to keep the economy on an even keel.

Analysts believe the central bank is likely to keep policy steady ahead of the once-in-five-years Communist Party Congress later in October, where President Xi Jinping is expected to consolidate his hold on power.

Regulatory tightening has moderated somewhat amid signs that a surge in money market interest rates earlier this year are trickling down to the real economy, and authorities appear unlikely to tighten the brakes any further in the near term.

China posted a flurry of disappointing data on Thursday - including its slowest growth in investment in nearly 18 years - suggesting the economy is finally starting to lose some momentum as borrowing costs rise.

The economy had defied expectations for a slowdown despite the stepped up property curbs and debt crackdown, partly as an infrastructure-led building boom has fed demand and prices for everything from cement to steel to other building products.

Outstanding yuan loans at the end of August grew 13.2 percent from a year earlier, more than an expected 13 percent rise but steady with the pace in July. (Reporting by Cheng Fang and Kevin Yao; Editing by Jacqueline Wong)