This week the TLT long-term US Treasury bond ETF bounced from a key support level.
Meanwhile, the three-month rate of change on core PCE—the Fed's preferred inflation measure—dropped to 2.2%, near the Fed's 2% target. With a looming government shutdown, we're also seeing the first serious Congressional effort to impose fiscal discipline in a long time. Any serious spending reduction would be positive for US bonds.
I don't think the economy is in imminent trouble, so I don't expect bond prices to rapidly climb from here. But I do think the worst of the selloff is probably done and it's a decent time to lock in that ultra low-risk mid-4% return.