Market experts in India are urging investors to stay composed during market fluctuations and refrain from making hasty decisions based on emotions like fear or greed. It is advised to adopt a long-term investment strategy, with a specific emphasis on large-cap stocks, taking advantage of the conducive environment created by lower oil prices and US yields. Financial planners are recommending novice investors to seek professional advice to maneuver through the ongoing market slump and steer clear of panic-driven selling.