No, a Demat account is not necessary for investing in mutual funds. Mutual funds are held in electronic form and managed by Asset Management Companies (AMCs). You can invest in mutual funds via finwell investment.

PMS is a personalized investment service where a professional portfolio manager manages your investment portfolio. It typically requires a higher investment amount compared to mutual funds. Mutual funds pool money from various investors to invest in a diversified portfolio managed by professional fund managers, making them more accessible to a broader range of investors.

MARS, or Mutual Fund Automated Rebalancing, is a service offered by some robo-advisors or investment platforms. It automatically adjusts the allocation of your mutual fund portfolio based on predefined criteria to maintain a desired asset allocation. This helps in keeping your investment in line with your risk tolerance and financial goals.

Mutual funds are managed by professional fund managers who conduct extensive research to pick stocks that align with the fund's objectives. If you want guidance on individual stock picking, consider consulting with a financial advisor or using investment research tools. However, it's important to note that mutual funds are a diversified investment option, reducing the risk associated with individual stock selection.