TOKYO: Japan’s Nikkei share average fell on Thursday, giving up much of its gains from the previous session, as the yen’s slide past the closely watched 160 per dollar level put traders on high alert for intervention.

The Nikkei closed down 0.82% at 39,341.54.

Technology shares underperformed to drag on the benchmark index after a sell-off in US chipmaker Micron Technology in after-hours trading soured the mood.

The broader Topix slid 0.33% to 2793.70, with a sub-index of growth shares sliding 0.6%, compared with a 0.08% decline for value shares.

Risk events loom for investors in all asset classes, including a US presidential debate later in the day, and the release of the Federal Reserve’s preferred inflation gauge on Friday.

The yen was last at 160.36 per dollar, after touching 160.88 overnight for the first time in 38 years. A plunge to 160.245 in late April triggered an official Japanese currency intervention worth about 9.8 trillion yen ($61.08 billion).

The proximity to the quarter-end may also be influencing markets. The Nikkei saw a three-day run of increasingly strong advances, culminating in Wednesday’s 1.26% surge.