Tokyo's Nikkei index inches down at close

Tokyo's key Nikkei index ended marginally lower on Wednesday as global investors locked in profits after recent rallies.

The benchmark Nikkei 225 index edged down 0.02 percent, or 6.85 points, to end at 40,090.78, while the broader Topix index added 0.39 percent, or 10.74 points, to 2,730.67.