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Securities | 12 Months Ended
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Dec. 31, 2017
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Securities |
7. | SECURITIES
|  | 2017 |  |  | 2016 |
Investments |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |
Bank certificates of deposit (CDBs) (1) |  |  | 3 |  |  |  | 46 |
Financial Notes (LFs) – Banks (2) |  |  | 303 |  |  |  | 728 |
Treasury Financial Notes (LFTs) (3) |  |  | 740 |  |  |  | 193 |
Debentures (4) |  |  | 11 |  |  |  | 45 |
Others |  |  | 1 |  |  |  | 2 |
|  |  | 1,058 |  |  |  | 1,014 |
Non-current |  |  |  |  |  |  |  |
Financial Notes – Banks |  |  | — |  |  |  | 14 |
Debentures |  |  | 30 |  |  |  | 17 |
|  |  | 30 |  |  |  | 31 |
|  |  | 1,088 |  |  |  | 1,045 |
(1) | Investments in CBDs accrue interest at CDI rate, which was 100.25% to 105.25% in 2017 (98.5% to 111% in 2016).
(2) | Bank Financial Notes (Letras Financeiras, or LFs) are fixed-rate fixed-income securities, issued by banks and that accrue interest a percentage of the CDI. The LFs accreud interest of 102.01% to 112% of the CDI ratefor the year ended December 31, 2017 (104.25% to 112.7% for the year ended December 31, 2016).
(3) | Treasury Financial Notes (LFTs) are fixed-rate securities, their yield follows the daily changes in the Selic rate between the date of purchase and the date of maturity.
(4) | Debentures are medium- and long-term debt securities, which give their holders a right of credit against the issuing company. The debentures have remuneration varying from 104.25% to 161.54% of the CDI rate in 2017 (104.25% to 113% in 2016).
Note 30 provides further information on these securities. Investments in securities of related parties are shown in Note 29.

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