June 4 (Reuters) - S&P Global ( SPGI ) said on Thursday it was not changing the rules for fast entry into their major indices, setting up a clash with Elon Musk's SpaceX which is set to start trading on the public markets next week.

Musk has rewritten the IPO playbook for ⁠SpaceX in many ways from planning to give retail investors a bigger role in allocations to pushing for early index inclusion, and structuring governance to preserve strong founder ​control.

S&P said "exceptions to the financial viability, seasoning, and IWF (investible weight factor) requirements should not be granted solely based on market capitalization".

SpaceX is aiming to raise $75 billion, the biggest ever for an IPO, in a ​deal that would value it at $1.75 trillion, immediately placing it among the top 10 most valuable U.S.-listed firms.

(Reporting by Pritam Biswas in Bengaluru; Editing by Arun Koyyur)