The yield on the notes climbed to more than 10 percent on March 21, 2014, the day after Gunvor co-founder Gennady Timchenko was sanctioned by the U.S. for his ties to Vladimir Putin.
Take context from the input text and decide on the accurate relationship between 'Gunvor' and 'Gennady Timchenko' from the options provided.
Options: publisher, founded by, business division, manufacturer