Indian equity markets opened the week on a sharp negative note, with the Nifty breaching the crucial 23,000 mark and tumbling over 225 points amid fears of a potential Reserve Bank of India repo rate hike, rising crude prices, and sustained foreign institutional investor selling. The rupee weakened to 95.88 per US dollar, while MCX gold and silver also logged notable declines. Amid broad market weakness, banking and financial shares suffered sig…