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Alger Spectra Fund Annual Fund Operating Expenses - Class I Shares [Member] - Alger Spectra Fund - Class I
Oct. 31, 2025
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.83% [1]
Distribution and Service (12b-1) Fees 0.25%
Other Expenses (as a percentage of Assets): 0.46% [2]
Expenses (as a percentage of Assets) 1.54%
[1] The Fund and Fred Alger Management, LLC (the “Manager”) have adopted fee breakpoints for the Fund. The advisory fee for assets up to $2 billion is .90%, for assets between $2 billion and $4 billion is .75%, for assets between $4 billion and $6 billion is .65%, for assets between $6 billion and $8 billion is .55%, and for assets in excess of $8 billion is .45%. The actual rate paid as a percentage of average daily net assets for the year ended October 31, 2025 was .83%.
[2] Other Expenses includes .29% related to dividend expenses on short positions and interest expenses.