MSSS vs EFFI overlap
MSSS and EFFI overlap 0.0% by weight, across 0 shared holdings.
Pick 2 to 4 ETFs.
These funds report on different dates (MSSS: May 31, 2026, EFFI: July 31, 2026), so market moves and index changes between those dates lower the number. Funds tracking the same index can read well below their true overlap.
Top shared holdings
These funds hold nothing in common.
Overlap by weight adds up the smaller weight of each holding the funds share, so 100% means identical portfolios. Long securities only: derivatives and cash vehicles are left out. Sources: MSSS, SEC Form N-PORT, May 31, 2026; EFFI, SEC Form N-PORT, July 31, 2026.
Largest institutions holding both
No 13F filer reports holding both.
This compares who owns the funds, not what the funds hold. From SEC Form 13F, for managers with $100M+ in US securities.
Who owns them: MSSS institutional holders, EFFI institutional holders.
Frequently asked questions
How much do MSSS and EFFI overlap?
0.0% by weight, with 0 holdings in common, using holdings for MSSS as of May 31, 2026 and EFFI as of July 31, 2026.
Do institutions hold both MSSS and EFFI?
0 Form 13F filers report positions in both, out of 13 that report either one.
How is overlap by weight worked out?
For each holding the two funds share, take the smaller of the two weights, then add those up. Identical portfolios score 100%.