v3.26.3
COMBINED FINANCIAL HIGHLIGHTS
 9 Months Ended
Sep. 30, 2026
COMBINED FINANCIAL HIGHLIGHTS [Abstract]  
COMBINED FINANCIAL HIGHLIGHTS
6.
COMBINED FINANCIAL HIGHLIGHTS
 
                     
 
For the Three Months
Ended September 30, 		    For the Nine Months
Ended September 30, 		    For the period
February 20, 2025
(Date of
commencement of
operations) through
September 30, 		 
    2026     2025     2026     2025  
                     
Net asset value per Share, beginning of period
 $14.67   $27.11   $22.70   $ 25.13(a)
Net investment loss(b)
  (0.01)    (0.01)    (0.03)    (0.01) 
Net realized and unrealized gain (loss) on investment in Digital Assets
  6.62    3.24    (1.39)    5.22 
Net increase (decrease) in net assets from operations(c)
  6.61    3.23    (1.42)    5.21 
Net asset value per Share, end of period
 $21.28   $30.34   $21.28   $30.34 
                     
Total return, at net asset value(d)
  45.06%   11.91%   (6.26)%   20.73%
                     
Ratio to average net assets(e)
                   
Net investment loss
  (0.19)%   (0.07)%   (0.19)%    (0.04)% 
Gross expenses
  0.19%   0.19%   0.19%   0.19%
Net expenses
  0.19%    0.07%(f)   0.19%    0.04%(f)
 
(a)
On January 22, 2025, Franklin Resources, Inc. (the “Seed Capital Investor”), an affiliate of the Sponsor, subject to conditions, purchased 4,000 Shares at a per-Share price equal to $25.00 (the “Initial Seed Shares”). Delivery of the Initial Seed Shares was made on January 22, 2025. Total proceeds to the Fund from the sale of the Initial Seed Shares were $100,000. On February 10, 2025, the Initial Seed Shares were redeemed for $100,000, and the Seed Capital Investor purchased two creation units in a cash transaction comprised of a total of 100,000 Shares at a per-Share price based on 11.06240875 bitcoin and 61.7774073 ether per Creation Unit, for a total of 22.1248175 bitcoin and 123.5548146 ether (the “Seed Creation Units”). The cash proceeds to the Fund from the sale of the Seed Creation Units were used by the Fund to purchase 22.1248175 bitcoin at the price of $97,227.80 per bitcoin and 123.5548146 ether at the price of $2,665.23 per ether on February 10, 2025 (exclusive of transaction and other costs incurred in connection with the conversion of the cash proceeds to bitcoin and ether respectively, which were paid by the Seed Capital Investor). Thus, the ultimate total proceeds to the Fund from the sale of the Seed Creation Units were $2,480,449.33 (an amount representing 22.1248175 bitcoin and 123.5548146 ether) representing 100,000 Shares at a per-Share price equal to $24.80. Further, the transaction and other costs incurred in connection with the Seed Creation Units were paid by the Seed Capital Investor and not borne by the Fund.
(b)
Calculated using average Shares outstanding.
(c)
The amount shown for a Share outstanding may not agree with the change in the aggregate gains and losses on investment for the period because of the timing of transactions in the Fund’s Shares in relation to fluctuating market values for the Fund’s underlying investment.
(d)
Total Return at NAV is calculated assuming an initial investment made at the NAV at the beginning of the period, and redemption of Shares at NAV on the last day of the period. Total Return at NAV as shown above includes adjustments in accordance with U.S. GAAP. Total return for periods of less than a year are not annualized.
(e)
Annualized.
(f)
From February 20, 2025 (the day the Shares were initially listed on the Exchange) to August 29, 2025, the Sponsor agreed to waive the entire Sponsor’s fee on the first $10.0 billion of the Fund’s assets.
Franklin Crypto Index ETF [Member]  
COMBINED FINANCIAL HIGHLIGHTS [Abstract]  
COMBINED FINANCIAL HIGHLIGHTS
6.
FINANCIAL HIGHLIGHTS
 
                 
   For the Three Months
Ended September 30, 		   For the Nine Months
Ended September 30, 		   For the period
February 20, 2025
(Date of
commencement of
operations) through
September 30, 		 
     2026      2025      2026      2025  
                     
Net asset value per Share, beginning of period
 $14.67   $27.11   $22.70  $ 25.13(a)
Net investment loss(b)
  (0.01)    (0.01)    (0.03)    (0.01) 
Net realized and unrealized gain (loss) on investment in Digital Assets
  6.62    3.24    (1.39)    5.22 
Net increase (decrease) in net assets from operations(c)
  6.61    3.23    (1.42)    5.21 
Net asset value per Share, end of period
 $21.28   $30.34   $21.28   $30.34 
                     
Total return, at net asset value(d)
   45.06%   11.91%   (6.26)%   20.73%
                     
Ratio to average net assets(e)
                   
Net investment loss
  (0.19)%   (0.07)%   (0.19)%   (0.04)%
Gross expenses
  0.19%   0.19%   0.19%   0.19%
Net expenses
  0.19%   0.07%(f)   0.19%   0.04%(f)
 
(a)
On January 22, 2025, Franklin Resources, Inc. (the “Seed Capital Investor”), an affiliate of the Sponsor, subject to conditions, purchased 4,000 Shares at a per-Share price equal to $25.00 (the “Initial Seed Shares”). Delivery of the Initial Seed Shares was made on January 22, 2025. Total proceeds to the Fund from the sale of the Initial Seed Shares were $100,000. On February 10, 2025, the Initial Seed Shares were redeemed for $100,000, and the Seed Capital Investor purchased two creation Units in a cash transaction comprised of a total of 100,000 Shares at a per-Share price based on 11.06240875 bitcoin and 61.7774073 ether per Creation Unit, for a total of 22.1248175 bitcoin and 123.5548146 ether (the “Seed Creation Units”). The cash proceeds to the Fund from the sale of the Seed Creation Units were used by the Fund to purchase 22.1248175 bitcoin at the price of $97,227.80 per bitcoin and 123.5548146 ether at the price of $2,665.23 per ether on February 10, 2025 (exclusive of transaction and other costs incurred in connection with the conversion of the cash proceeds to bitcoin and ether respectively, which were paid by the Seed Capital Investor). Thus, the ultimate total proceeds to the Fund from the sale of the Seed Creation Units were $2,480,449.33 (an amount representing 22.1248175 bitcoin and 123.5548146 ether) representing 100,000 Shares at a per-Share price equal to $24.80. Further, the transaction and other costs incurred in connection with the Seed Creation Units were paid by the Seed Capital Investor and not borne by the Fund.
(b)
Calculated using average Shares outstanding.
(c)
The amount shown for a Share outstanding may not agree with the change in the aggregate gains and losses on investment for the period because of the timing of transactions in the Fund’s Shares in relation to fluctuating market values for the Fund’s underlying investment.
(d)
Total Return at NAV is calculated assuming an initial investment made at the NAV at the beginning of the period, and redemption of Shares at NAV on the last day of the period. Total Return at NAV as shown above includes adjustments in accordance with U.S. GAAP Total return for periods of less than a year are not annualized.
(e)
Annualized.
(f)
From February 20, 2025 (the day the Shares were initially listed on the Exchange) to August 29, 2025, the Sponsor agreed to waive the entire Sponsor’s fee on the first $10.0 billion of the Fund’s assets.