The domestic benchmark indices — the S&P BSE Sensex and the National Stock Exchange Nifty50 — had lost close to 1.5 per cent in three days last week before gaining slightly on Friday and Monday. Notwithstanding weakness and volatility, the Nifty50 has managed to hold on to the 18,000 mark, while the Sensex has managed to stay above the 61,000 level. The performance of the stocks that comprise these front-line indices remains polarised. The 20 stocks that comprise the Nifty50 index appear weak, according to their technical chart patterns.