Teradyne falls on downbeat fourth-quarter profit forecast
** Shares of chip-testing equipment maker Teradyne TER.O down 5.3% at $306 in extended trading
** TER forecast Q4 adj. profit per share of $1.95 to $2.25, below analysts estimates of $2.06 per share, according to data compiled by LSEG
** Posts Q3 adj. profit of $2.29 per share versus estimates of $2.08 per share
** Q3 revenue came at $1.31 billon compared with Wall Street expectations of $1.26 billon
** Median PT of 18 brokerages covering TER is $420, according to data compiled by LSEG
** As of Monday's close, stock up about 49% YTD