Markets reverse early gains; sensex down over 500 points

Indian indices, sensex and Nifty, have dropped due to weak global cues and rising global economic uncertainties. The sensex is down over 600 points and Nifty has slipped below 19,100 mark. Investors are cautious due to the tense geopolitical landscape in the Middle East. The 19,000 mark is seen as pivotal, with significant put writing observed at this level. Traders are advised to use strategies with defined risks and low-risk income, while investors are recommended to gradually gather stocks.