How can brothers gift SIPs to their sisters on Raksha Bandhan?

Brothers can't gift SIPs to their sisters the way they do with cash, as mutual funds restrict third-party payments from accounts that aren't in the SIP holder's name. Brothers can instead set up payment mandates on Raksha Bandhan to transfer funds to their sisters' accounts, which they can use for SIPs. Money gifted from brothers to their sisters is tax-free.