Tandem Diabetes Care drops after issuing voluntary device correction for certain insulin pumps

** Shares of diabetes device maker Tandem Diabetes Care TNDM.O fall 24.3% to $10.9 premarket

** TNDM says it issued a voluntary correction for certain insulin pumps, citing a speaker malfunction that could halt insulin delivery and disrupt communication with glucose monitoring devices

** Co reports 700 confirmed adverse events and 59 injuries associated with the issue

** No deaths had been linked to the problem with the t:slim X2 insulin pumps - TNDM

** Up to last close, stock down 60.1% YTD