Mutual fund advisors are getting ready for 'difficult December.' Planners dub December a difficult month because they get countless requests for last-minute tax planning during the month. This year they have a unique problem: many new mutual fund investors are hellbent on investing a lumpsum in Equity Linked Savings Scheme (ELSS) to save taxes this year. Advisors say this is risky as the market is currently hovering around its all-time high, but the new investors are not in a mood to listen.