With the markets already reeling under the shadow of rolling settlement, the spate of profit warning from the Nasdaq only added fuel to fire. With FIIs joining the sellers later in the week, the Sensex dipped by 123 points to close below the psychological barrier of 3400 points. On a year to date basis, the Sensex has lost 15%, shedding 582 points in the process. The profit warning from two-technology bellwethers on Nasdaq, Nortel Networks and JDS Uniphase, pushed the precariously poised Sensex in the bear grip. Nortel is one of the top clients for Infosys and Wipro and hence, the e