* Aussie shares fall 0.2 percent
* Materials lose most on weak commodities prices
* NZ gains 0.2 percent
By Aditya Soni
Jan 31 (Reuters) - Australian shares were on track to fall for a second straight day on Wednesday, led by materials, with stock round the world weakening in the wake of falling oil prices and rising bond yields.
The S&P/ASX 200 index .AXJO fell 0.2 percent or 12.10 points to 6,010.70 by 0120 GMT. The benchmark declined 0.9 percent on Tuesday.
"For the past couple of days we've had a bit of caution creeping in the world equity markets ahead of a number of key events that could change the outlook for the bond markets and stock market valuation," said Ric Spooner, chief market strategist at CMC Markets.
The U.S. Federal Reserve is widely expected to keep interest rates unchanged when its two-day policy meeting concludes later in the global day, but investors will look for hints on the outlook for rates in the policy statement.
An official survey on the Chinese manufacturing sector made discouraging reading for Australian exporters. It showed growth slowed to an eight-month low in January, reinforcing the view that the world's second largest economy, and Australia's biggest export market, was beginning to lose steam. Australia, the metals and mining index .AXMM dipped nearly a percent to its lowest in four-weeks.
BHP BHP.AX , the country's biggest company by market cap, slid 1 percent to a one-month low, dragging the index, while its rival Rio Tinto (LON:RIO) Ltd RIO.AX fell 1.9 percent.
Banks followed closely, mirroring their U.S. counterparts which fell 1.2 percent on Tuesday.
Commonwealth Bank of Australia (CBA) CBA.AX declined 0.2 percent. Australia's corporate regulator said on Tuesday it had started legal proceedings against CBA over rate-manipulation allegations. stocks also fell as oil slid, driven by ongoing evidence of rising U.S. crude output. O/R
Origin Energy Ltd ORG.AX slipped 1.6 percent despite a 26 percent rise in second-quarter revenue. the positive side, real estate stocks surged after the release of inflation data, which was seen as slightly soft, reducing expectations for a rise in Australian interest rates. developer Scentre Group SCG.AX rose 2 percent, while Stockland Corp Ltd SGP.AX climbed 0.6 percent.
Sirtex Medical SRX.AX soared 46 percent and was the top percentage gainer on benchmark, after accepting $1.3 billion takeover offer from Varian Medical Systems (NYSE:VAR) VAR.N on Tuesday. Zealand shares rose, with the benchmark S&P/NZX 50 index .NZ50 rising 0.2 percent or 16.66 points to 8,315.24.
Industrials and healthcare stocks accounted for most of the gains, with Ryman Healthcare Ltd RYM.NZ rising 2 percent and Auckland International Airport Ltd AIA.NZ climbing 1.1 percent.