0600 GMT - For long-term investors, a 5% yield on five-year U.S. Treasurys is a very attractive level to buy, says Mohit Kumar at Jefferies. "Problem is most investors are thinking till end November or December, which is their year-end, rather than from a long term basis," the global economist says in a note. While elevated oil prices and deficit concerns remain the main reasons for the high bond yields, the time of the year has also led to buyers to be unwilling to buy and support the market, he says. On Friday, five-year Treasury yield closed at 5.020%, according to Tradeweb.