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The biggest S&P 500 Index winners and losers since April 4

After eking out another gain in yesterday’s session, US stocks have now climbed nearly 20% since bottoming on April 4, sending the S&P 500 Index within spitting distance of its all-time high close of 6,144 in February.

Powering that rally, literally and figuratively, has been the AI trade. Sherwood News’ Luke Kawa pointed out last week that chip stocks like Broadcom — as well as the “picks and shovels” names enabling the AI capex orgy — are at or near record highs. But which other companies have been the biggest winners and losers in this latest rally?

Outside of tech, Constellation Energy, which signed a major 20-year deal with Meta to supply it with nuclear power last week, is a top riser with a 70% gain since April 4, while another top stock, NRG Energy, may owe its performance to an accounting trick. As of today, the biggest gainer is Arizona-based semiconductor company Microchip Technology, with a 93% gain.

Meanwhile, of the 73 decliners in the index, there is a certified biggest loser: UnitedHealth, which, with a 42% drop, is far lower than the next in line, Enphase Energy, which has suffered a 21% decline since April 4.

Outside of tech, Constellation Energy, which signed a major 20-year deal with Meta to supply it with nuclear power last week, is a top riser with a 70% gain since April 4, while another top stock, NRG Energy, may owe its performance to an accounting trick. As of today, the biggest gainer is Arizona-based semiconductor company Microchip Technology, with a 93% gain.

Meanwhile, of the 73 decliners in the index, there is a certified biggest loser: UnitedHealth, which, with a 42% drop, is far lower than the next in line, Enphase Energy, which has suffered a 21% decline since April 4.

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SpaceX reportedly files confidentially for IPO

SpaceX confidentially filed its draft IPO paperwork with the Securities and Exchange Commission, Bloomberg reports, citing people familiar with the matter, the next step toward what is expected to be a blockbuster summer listing.

Elon Musk’s satellite and rocket company could raise around $75 billion in an IPO that would value it at more than $1.75 trillion — both records — though the exact amounts won’t be settled until it goes public, likely in June.

Another notable thing about this IPO: the portion of shares committed to individual investors is expected to be much higher than in traditional IPOs — per Reuters, up to 30%, versus the typical 10% — a move that could broaden retail participation in one of the most anticipated public offerings ever.

Another notable thing about this IPO: the portion of shares committed to individual investors is expected to be much higher than in traditional IPOs — per Reuters, up to 30%, versus the typical 10% — a move that could broaden retail participation in one of the most anticipated public offerings ever.

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Energy stocks tumble after massive March

Energy and chemical stocks tumbled early Wednesday on growing expectations that the US participation in the Iran war is nearing an end, and West Texas Intermediate crude oil futures slipped back below $100 a barrel.

LyondellBasell, APA Corporation, Dow, Inc., CF Industries, and Marathon Petroleum — the S&P 500’s top 5 gainers last month — all sank.

Natural gas drillers EOG Resources, Devon Energy, Coterra Energy, and Diamondback Energy dropped, as did integrated oil giants Exxon and Chevron. Fuel refiners and marketers such as Phillips 66 and Valero also fell.

Don’t shed too many tears for these energy giants; the S&P 500 energy sector rose 10% in March and 37% in Q1 2026.

The Energy Select Sector SPDR Fund is coming off its second-best quarter on record relative to the SPDR S&P 500 ETF, based on data going back to 1999.

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