Investor demand for US-listed spot Bitcoin ETFs has rebounded in recent weeks, but net flows for the year remain firmly in the red.August brought in $3.52 billion in fresh capital, followed by $770.15 million so far this month, according to SoSoValue. That momentum gives bulls hope the worst of the doldrums has passed. The broader math says otherwise.Despite the winning streak, the funds remain down roughly $1 billion year-to-date.June Alone Erased $4.51 BillionThe lingering deficit traces to May and June, when institutional capital left the funds at pace.June alone wiped out $4.51 billion, completely erasing gains achieved during March and April. Two months of outflows created a hole that four months of recovery has nearly, but not entirely, filled.The progress is real. The year-to-date deficit stood near $2.5 billion at the end of August and has narrowed to roughly $1 billion since. Another few sessions at September's pace would close it.But the arithmetic underscores an asymmetry worth noting. Recovering $4.29 billion across August and early September has not offset what left in a single month. Outflows in this product category arrive faster than inflows.Bitfinex Frames the Test as Whether Rates Still Bind"The key test now is whether those inflows survive this week's CPI and Treasury buyback," analysts at Bitfinex said in a note to CoinDesk.If investors continue buying while short-term yields remain elevated, they added, it would indicate the policy rate is no longer the binding constraint on Bitcoin.That framing is the sharpest available read on what the next few sessions actually measure. The question is not whether Bitcoin rises or falls, but whether ETF allocators keep buying through a rate environment that would historically have stopped them.The two-year Treasury yield hit a 52-week high near 4.4% after August payrolls printed 162,000 against forecasts near 56,000. Markets price 58% odds of a September hike and 70% for October. If flows persist against that, the relationship between Bitcoin and the policy rate has changed rather than merely paused.The Currency Market Has Already Signalled the ShiftFX has stopped reading bond yields the old way, and the correlation data supports the same conclusion for Bitcoin.Bitcoin's 90-day correlation with the 10-year Treasury yield sits at −0.17 against gold's −0.41 — meaning a rising yield barely dents it, while gold responds more than twice as strongly.That spread showed up in live trading last week. Gold fell from $4,700 an ounce to $4,300 in under a week as the 10-year climbed above 4.81%. Bitcoin held choppy between $76,000 and $80,000 through the same stretch.The mechanism turns on why yields are rising. When they climb on fiscal deterioration rather than growth, the investors demanding more compensation to hold government paper are the same ones seeking assets outside that system.PPI Thursday and CPI Friday Are the Immediate TestsProducer prices arrive Thursday and consumer prices Friday — the final major inflation readings before the Federal Reserve's September 15-16 meeting.Headline CPI is forecast at 0.4% month-over-month against 0.1% previously, a quadrupling, while core holds at 0.2% and eases to 2.4% year-over-year from 2.5%. That split is the week's analytical problem: headline accelerating on energy, core flat to cooling.Fed officials are already in communications blackout, so no one will interpret either print until the decision.Oil at a Three-Month High Is the Live HeadwindThe crypto market is not clear of pressure. Oil has surged 10% this month, with Nymex WTI futures hitting a three-month high above $94 earlier today.If those gains accelerate, they could trigger fresh inflation concerns and spark risk aversion across global markets.The escalation driving it is ongoing. US Central Command confirmed striking three Iranian oil tankers over the weekend, and Tehran said it would announce a restricted zone outside the Strait of Hormuz in coming days. Diesel prices — an input cost across nearly every physical supply chain — hit record highs last week and sit roughly 90% above pre-war levels.Bitcoin traded near $78,351, having slipped from the $80,000 level it circled through the weekend.The distinction Bitfinex draws still applies. Elevated yields have not stopped the ETF bid so far. An accelerating oil shock that forces a broader risk-off move is a different mechanism, and one the correlation figures do not capture.