Singapore’s state investment fund Temasek has sold its stake in cryptocurrency exchange Coinbase (COIN), according to the latest filings from the U.S. Securities and Exchange Commission (SEC). In the third-quarter filing, the fund listed 8,168 Coinbase stock ownership, worth about $2.1 million, but the fourth-quarter filing showed no Coinbase holdings. Temasek's total portfolio is worth US$301 billion by the end of 2021. Coinbase’s stock has fallen about 40 percent since its initial public offering last April, market data shows.