** British chip designer ARM Holdings up 45 pct at arecord high
** Japan's SoftBank Group Corp to buy co for 24.3bln stg ($32 bln)
** SoftBank will pay 1700p in cash for each ARM share,representing a premium of >40% to Friday's close
** 40 pct of co's 30-day avg vols gone through in the firstten minutes of trade
** Peers Infineon, Dialog,STMicroelectronics up 2-4.4 pct
** Up to Friday's close, ARM shares had risen 14.4 pct YTD vsa 6.5 pct fall in the STOXX 600 Technology index (RM:sanjeeban.sarkar.thomsonreuters.com@reuters.net)