Established ‘Sell in May’ philosophy looks broken, and that could be good news for Bitcoin

“Sell in May and go away” is the idea that stocks reliably underperform between May and October, and it describes a market that might no longer exist. Bloomberg Intelligence data shows the S&P 500 ETF has closed the May-October period in positive territory in 25 of the last 33 years, with only one negative summer stretch in the past decade. Bespoke data cited by Bloomberg shows the cumulative return from holding SPY is only in May-October since the ETF's 1993 debut, at roughly 171%. That is real money, just considerably less than the 731% earned by staying long only in November-April. Despite the seasonal performance difference, the cliché that May automatically means sell does not hold. A Bloomberg Intelligence chart shows SPY closed the May–October period positive in 25 of the last 33 years, returning 171% versus 731% in November–April. The rule that might have stopped working The logic behind the old saying is that corporate earnings slow, trading desks thin out, and investors rotate into cash or bonds until autumn. That playbook worked well enough for decades, built for a market where institutional money moved slowly, and risk appetite followed a predictable rhythm. Bitcoin has spent two years building direct plumbing into traditional portfolio flows. Data from Farside Investors shows that US spot Bitcoin ETFs pulled in roughly $1.5 billion between Apr. 17 and 24, and cumulative net inflows have reached approximately $58.3 billion. That market structure has folded Bitcoin into the same risk appetite machinery that drives equities, giving BTC direct exposure to whatever keeps institutional investors willing to hold. When institutional money does not reflexively de-risk into summer, BTC avoids one of the psychological headwinds that have historically hit speculative assets in May. The Federal Reserve's own research has flagged that crypto ETP bid-ask spreads are broadly comparable to those of similarly sized equity ETFs and ETPs, and has argued that NAV premiums in crypto funds warrant monitoring as a measure of how interconnected crypto and equity markets have become. Related Reading This week Bitcoin will face major volatility across a key 48 hour period: Fed first, GDP and PCE right after Bitcoin faces a 48-hour macro trap as the Fed speaks first, but GDP and PCE get the last word. Apr 27, 2026 · Andjela Radmilac Bitcoin's May setup The case for Bitcoin entering summer with fewer headwinds depends almost entirely on what the next six weeks of data deliver . The Fed's Apr. 28-29 meeting produced a policy decision and a press conference by Fed Chair Jerome Powell on Apr. 29. The Bureau of Economic Analysis releases first-quarter GDP and March PCE on Apr. 30. April payrolls land May 8, April CPI arrives May 12, and the FOMC minutes from the April meeting come May 20, and the next full Fed meeting runs June 16-17. Date Event Latest reading / setup in the article Why markets care BTC read-through Apr. 28–29 Fed meeting + Powell press conference Fed stays on pause unless data force a shift Sets the tone for rates, liquidity, and how hard the Fed pushes back on cut expectations A patient, data-dependent Fed supports risk appetite and helps BTC avoid a seasonal de-risking narrative Apr. 30 Q1 GDP + March PCE GDPNow estimated Q1 growth at 1.2% as of Apr. 21; February PCE was 2.8%, core PCE 3.0% Shows whether growth is slowing cleanly or sliding toward stagflation, and whether inflation is cooling enough to keep easing hopes alive Soft-but-stable growth with contained inflation is constructive for BTC; weak growth plus sticky inflation is a problem May 8 April payrolls March labor market was still firm enough to keep the Fed cautious A cooler jobs print can keep rate-cut hopes alive; a hot print can push yields higher Cooling labor data without recession fear is bullish for BTC; re-accelerating jobs can weigh on BTC through higher yields May 12 April CPI March CPI was 3.3% y/y, core CPI 2.6%; Cleveland Fed nowcast for April CPI was 3.56% y/y CPI is the cleanest near-term test of whether inflation is re-accelerating A softer print helps the risk-on case for BTC; a hotter print can revive “Sell in May” through tighter financial conditions May 20 FOMC minutes Markets look for detail on how concerned officials were about inflation and cuts Minutes can reinforce or soften the message from Powell’s press conference If the minutes show a high bar for cuts, BTC may trade more like a high-beta macro asset June 16–17 Next full Fed meeting By then markets will have GDP, PCE, payrolls, CPI, and the April minutes This is the point where the May data run either confirms or breaks the summer risk-on thesis If macro stays benign, BTC can hold the $72,000–$85,000 range into this window; if inflation and yields rise, downside toward $65,000–$72,000 becomes more plausible That sequence either confirms that “Sell in May” has lost its macro rationale or rebuilds it this time. Atlanta Fed's GDPNow put first-quarter growth at 1.2% as