Does it mean "the timing of announcing the letter" or "the timing of going ahead with the proposal"? I used this link: http://www.oxfordlearnersdictionaries.com/definition/english/timing?q=timing
"Other market players have noted that the timing could be interesting, especially given how expensive corporate bonds are trading as well as the price of Asian low-yielding bonds — specifically in Singapore and South Korea. Announcements like these also serve to highlight there may still be value in owning U.S. and European fixed income should another recession strike."
Source: The world's biggest sovereign wealth fund wants to alter its strategy — the effects could be global