The investors of the Tata Group-- Indias largest conglomerate-- lost a staggering Rs 156266 crore as the stocks of the groups top-5 most valued companies plummeted by an alarming 19 percent on Monday. According to market data the shares of Trent slumped to Rs 4491.75 a decline of over 19 percent from Fridays Rs 5561.25 with its market capitalization crashing Rs 38019 crore to Rs 1.59 lakh crore from Rs 1.98 lakh crore. Trents stock has crashed more than 46 percent from its 52-week high. Similarly the shares of Tata Consultancy Services (TCS) also hit a 52-week low on Monday crashing 7.25 per cent to Rs 3060.25 with its mcap witnessing a rout of Rs 86545 crore falling to 11.07 lakh crore. TCS stocks have lost a third of their value from its 52-week high at Rs 4585.90. Notably TCS Indias largest IT services exporter emerged as the biggest laggard last week losing a whopping Rs 1.10 lakh crore of its valuation. As per market data Tata Motors and Tata Steel  stocks crashed 11.5 percent each on Monday with the automaker losing Rs 26246 crore of its mcap as is shares dipped to Rs 542.55 apiece while Tata Steels value dropped by Rs 20285 crore slipping to Rs 1.55 lakh crore its share prices crashing to Rs 124.20. Tata Motors and Tata Steel cracked 11.5 per cent each on Monday. The automakers total valuation slipped Rs 26246 crore below Rs 2 lakh crore on Monday as the stock tested its 52-week low at Rs 542.55. Tata Steel saw a Rs 20285 crore slump in its mcap to 1.55 lakh crore. The stock crashed to Rs 124.20. The stock prices of Titan Company slipped more than 4 percent to Rs 2947.55 as the Tata Groups fashion jewelry arm lost Rs 11417 crore of its market cap which now rests at Rs 2.61 lakh crore. The development comes after Tata Consultancy Services (TCS) Reliance Industries Limited (RIL) the oil-to-telecom conglomerate owned by Asias richest man Mukesh Ambani and Narayana Murthy-led Infosys emerged as the biggest laggards last week losing Rs 1.10 lakh Rs 95000 crore and Rs 49000 crore of their market cap respectively. The rout of Tata Group stocks comes months after its former Chairman Emeritus Ratan Tata passed away at the age of 86 in October last year. Shortly after Ratans passing Noel Tata his half-brother was chosen by the board to lead Tata Trusts-- the majority stakeholder in Tata Sons the holding company of the Tata Group-- as its Chairman.