BofA's Hartnett: An October Rate Hike May Be the Biggest Catalyst for Risk Assets

Rates once again drove global markets over the past week. The U.S. 10-year Treasury yield briefly touched 5.36% and the 30-year climbed to its highest since 2002; the 10-year auction cleared at its highest yield since 2000, though strong overseas demand near record levels helped steady sentiment. Across the Atlantic, the French-German spread widened to 140 basis points, back in the pressure zone last seen during the 2011-2012 euro crisis. Bank of America strategist Michael Hartnett distilled his core thesis into three words in the latest Flow Show: "Bond bubble ends." The counterintuitive corollary: the most bullish event for risk assets before year-end would be a Fed hike in October, a deliberate tightening to rein in runaway long-term yields. The logic holds together. U.S. equities are still up 13.4% this year, with the S&P 500, Nasdaq and global technology indices near highs, while government bonds are down 4.4% and trail cash by 7.2 percentage points. Stocks have not been knocked down by rates because U.S. hard data, global earnings expectations and capex forecasts from the giant cloud providers have not been revised meaningfully lower. Bonds are cracking first where they are most fragile: Korean brokerages, French government debt, CCC-rated credit. The real risk is not simply high rates. It is that once rates rise, fiscal policy, elections, AI capital spending and cash flows are all forced to reprice. If the Fed does not move proactively, long-end yields may keep surging. If Democrats sweep both chambers in the midterms, the political discount rate on equities could shift abruptly. And with cash yields still above 4%, $8 trillion in money market funds may not rush into stocks. The assets most dependent on cheap money are hit first in a bond selloff. Hartnett points to South Korea: over the past 18 months, Korean bond yields have risen roughly 200 basis points, and Mirae Asset, the country's largest retail brokerage, has fallen 65% since May after a fourfold run higher. That does not mean the Korean equity bubble has burst, since the market is still up 98.9% this year, among the strongest worldwide. It shows something else: when the cost of capital jumps, the sectors most exposed are typically those with the highest financial leverage and trading activity. Global central banks are aligning with the shift. Since 2026 they have delivered 54 rate hikes, the first net tightening since September 2023. Divergence in asset performance underscores the split. Year to date, oil is up 58.5%, U.S. equities up 13.4% and global equities up 10.6%; cash has returned 2.8%, government bonds are down 4.4%, gold down 4.8% and bitcoin down 6.7%. The humiliation of bonds is the standout: cash beat government bonds. An October hike is read as bullish precisely because no hike would let long-term rates spiral. The rise in U.S. rates splits into two parts: continued strong growth and rising uncertainty. Supply, commodity and fiscal concerns matter too, but they are not the core explanation. The key change came after Jackson Hole. Until then, the market had another anchor: policy was already restrictive, and rates were ultimately expected to return to around 3%. BofA rate strategists note that once this anchor line is cut, yields keep climbing until data deteriorates or the market itself breaks. Their conclusion is unwelcome for anyone waiting for a peak: "We believe neither of these conditions is currently met. Any dovish suppression by the Fed of front-end pricing merely shifts rate pressure to the long end." This time, the rise in the 10-year yield since late September has been driven mainly by the term premium rather than a repricing of the fed funds path, which makes the situation harder. Hence the seemingly odd call: the Fed must either hike or accept continued steepening. September FOMC minutes showed all 19 officials backed a hike, with most seeing another increase this year as appropriate. The market prices only a 17% chance of a move at the October 28 meeting and 81% for December 9. BofA rate strategists think the market is mispriced and have positioned accordingly, paying the October FOMC OIS. Their point is blunt: "If U.S. data remains strong, the Fed must choose: raise rates or endure steepening bond yields. If frightened by steepening yields, the Fed will hike." The bullish logic is not that hikes help stocks. It is that if the Fed uses an October hike to show it will contain inflation and the term premium, the market may stop worrying about the 10-year heading toward 6%, easing pressure on equities. The fiscal gap is now plain, and France is the clearest case. The other side of higher rates is who pays. BofA chief global economist Claudio Irigoyen says the rate shock is "exposing the unsustainable reality of fiscal policy in advanced economies," led by the U.S. and France, with Japan and the U.K. behind. The root problem is what economists call time inconsistency. Over 20 years, U.S. debt-to-GDP has risen about 60 percentage points and France's about 50, most of it during the zero-rate era. That debt funded permanent spending and permanent tax cuts. With financing costs normalizing, there is not enough political support to cut spending or raise taxes. Both countries carry debt-to-GDP near 120% with primary deficits above 2.5% of GDP; the headline deficit runs about 6% of GDP in the U.S. and about 5% in France, the U.S. figure higher largely on a heavier interest burden. France shows the clearest rift. Bloomberg notes the French-German spread is back at 140 basis points, the fastest selloff in France's sovereign spread in at least 20 years, quicker even than 2011. Markets have no patience for France's fiscal stance, and several data points make the case: since the post-pandemic peak, advanced economies have cut debt-to-GDP by 11 percentage points on average, France has not; French private non-financial debt is 214% of GDP against 140% in the U.S.; the median net income of French retirees nearly matches that of active workers; and France has not run a primary surplus since 1974. According to the Wall Street Journal, Paris is weighing more short-term government bond issuance. Rabobank called it "the latest example of a developed market economy behaving like an emerging market." U.S. Bank Europe credit strategist Barnaby Martin expects the French-German spread to oscillate between 100 and 150 basis points; a rapid move toward the upper end would raise the odds of short-term issuance, ECB verbal intervention or the TPI tool. Stocks have not fallen yet, but that does not mean hikes have not bitten. High rates have had an effect; they simply have not yet hit the market's core assets. U.S. hard data has not clearly slowed, global forward earnings expectations have not declined, and capex expectations for hyperscalers keep rising, with consensus 2027 forecasts still steepening. As long as AI-related spending supports real demand, there is a case for yields to rise further. According to BofA's Barnaby Martin, the moment U.S. macro data slows will signal that rate volatility has peaked and credit markets will get the green light again. Credit markets already show stress at the margins. In September's high-yield spread widening, less than 30% can be explained by higher refinancing costs or expected losses; the rest looks like a rate-volatility premium. CCC spreads have reached 1,200 basis points, the widest since 2022. Even within equities there has been some loosening: the BofA Bull & Bear Indicator has slipped from 9.3 two weeks ago to 8.1, still in sell territory. The global breadth rule shows 50% of global equity indices oversold, below both their 50-day and 200-day moving averages, but a contrarian buy signal needs a net 88%, unlikely in the near term unless tech-heavy markets such as the U.S. and South Korea reverse sharply. $8 trillion in cash is not natural buying demand. Fund flow data is clear: in the week to Wednesday, cash inflows hit $166.4 billion, the most since April 2020; bonds took in $33.8 billion, equities $12.4 billion and gold $2 billion, while crypto assets saw a $600 million outflow. The $118 billion of cash that left the week before on quarter-end factors not only returned in full but exceeded that amount. Breaking it down, U.S. Treasuries drew $16.2 billion, the most since April 2025; investment-grade bonds took $10.3 billion; bank loans attracted $2.4 billion, the most since February 2025, with floating-rate products emerging as a hedge against hikes. Technology stocks kept drawing $3.5 billion, while financials saw $3 billion of outflows, the largest since March 2023. Money market funds now total roughly $8 trillion, up from $5 trillion in 2023. At a 4.2% T-bill yield, that cash generates about $330 billion in annual interest income. Hartnett's liquidity signal is blunt: "No rate cuts mean no reduction in cash." Historically, big rotations from off-market cash into stocks have followed major easing: QE in 2009, QE4 in 2020, or extended Fed cutting cycles. Today's environment does not qualify. The midterms have created an uncomfortable probability distribution. The November 3 U.S. midterm elections are the event most likely in coming months to trigger a 10% swing in stocks. Polymarket puts the Democrats' odds of sweeping both chambers at 64%, up from 49% in September; Republicans holding the Senate while Democrats take the House at 28%; a Republican sweep at just 9%. Trump's approval rating is 38%, with economic issues at 34% and inflation at 27%. The market's discomfort is that the most probable outcome is also the most risk-averse path. In a Democratic sweep, stocks could fall more than 10%, the dollar and bond yields could decline, and international stocks could outperform U.S. equities, with Europe beating Asia. Tax and regulatory pressure would likely rise, weighing on EPS. More important, the Trump administration's political capital to pursue resource monopolies and corporate policy alignment would shrink. If Republicans hold the Senate and Democrats take the House, the divided-government or Goldilocks risk-appetite scenario, stocks could rise more than 5%. A Republican sweep would be the biggest upside surprise, with stocks up more than 10% and AI trades continuing toward 2027 bubble conditions. The state to watch may be Texas. Republican incumbent Governor Greg Abbott leads Democratic challenger Hinojosa by just 48% to 46%. Texas is also a focal point for AI data center approvals and grid strain, where the clash between affordability and AI capex will be repriced at the ballot box. Outside the U.S., the political rightward-shift trade continues. U.S. political risk is negative, but overseas there is another line of reasoning: rightward trading. Bolsonaro won Brazil's first round, with the runoff on October 25. Of 20 Latin American countries, 11, roughly 420 million people, are now under right-wing leadership; before the previous election round, that was 7 countries and about 60 million. Market reaction was immediate: Brazil's stock market hit an all-time high and the 10-year yield plunged 124 basis points in a single day. The MSCI Latin America Index is still 35% below its record high, which is why Latin America is now joining the global rotation bull market sequence: Europe in the first half of 2025, Japan and emerging Asia from the second half of 2025 into the first half of 2026, and now Latin America alongside broader emerging markets. Europe has similar political variables. Italy and Germany have shown rightward shifts, and Le Pen leads French opinion polls for the April 2027 presidential election. Spain's Prime Minister Sanchez has called an early election for November 29, with polls pointing to a center-right lead, which Hartnett calls "an underappreciated positive event for European bonds." Next, watch the price line. Several key levels matter more than macro narratives. Under this framework, near-term positioning favors risk contraction ahead of the midterms. Three indicators support that view: global central banks are net tightening again, financial conditions are tightening, and early credit-event signals persist, including moves in AUD/JPY, risk-parity strategies and credit default swaps for tech names such as Oracle and SoftBank. Tech stocks are not suited to further chasing, with investors already heavily positioned; MAGS may still outperform SOX, and Chinese tech offers contrarian appeal. On bonds, position early for peak-yield trades: 30-year Treasuries, small caps, REITs and Hong Kong real estate. Keep overall exposure to gold, commodities and emerging markets. Several price levels carry more operational weight than macro slogans: 6% on the 10-year Treasury is the key zone where bond buying demand waits; a 150bp French-German spread approaches the threshold where policy support becomes more likely; a net 88% oversold reading on the global breadth rule is a stronger contrarian buy signal; the Bull & Bear Indicator below 8, rather than 8.1, is closer to the risk-reduction zone; the 30-year Treasury auction yield has reached 5.618%, a concrete entry point for long-bond positioning. The calendar is packed: Brazil's runoff on October 25, FOMC on October 28, the U.S. midterms on November 3, APEC in Shenzhen on November 18, Spain's general election on November 29, FOMC on December 9, and the G20 in Miami on December 14. Hartnett wraps it up in one line: "Most investors are waiting for the 10-year yield to reach 6% before buying Treasuries; we've made small positions in the peak-yield trade ahead of time." If the Fed hikes in October and caps long rates, risk assets may get a reprieve. If the midterms deliver a Democratic sweep, U.S. equities will need repricing. And if yields keep rising while data stays stubborn, the bond bubble's end will keep playing out where it hurts most.