The Tokyo Stock Exchange halted trading in derivatives including Topix futures and Japanese government bond futures for more than an hour on Tuesday morning, suffering a glitch for the second time in six months.

Trading resumed at 10:55 am Tokyo time.

A TSE spokeswoman said the exchange was still investigating the problem.

The last time the exchange was hit by a glitch was on Feb. 2 when cash-share trading was halted in the morning session. In that case, trading in 240 shares and instruments was affected.

Tuesday's suspension was the biggest for derivatives trading since July 2008 and the first such incident for the derivatives trading system installed in October 2009, a spokesman for the Tokyo bourse said.

The latest glitch did not affect cash trading, with both the Nikkei and the Topix up 0.6 percent after Tuesday's morning session.

However, traders said trading volume in the cash market was affected by the suspension in futures trading. Volume on the Topix was light, at 39 percent of its full daily average for the past 90 days.

The September 10-year JGB futures ended morning trade down 0.19 points to 144.25, back below their 14-day moving average after closing above it for two sessions.