Explainers
Evergreen guides to how the market actually works, from 13F filings to HBM memory.
Countries are buying AI compute like oil reserves. Nvidia says it's already a $30 billion business.
Governments are buying AI compute as national infrastructure, and specialized neoclouds are renting out GPUs at scale, but the two overlap more than the headline numbers suggest. What it means for Nvidia, Oracle, CoreWeave, Nebius and IREN.
The densest AI racks need liquid cooling. Vertiv (VRT), nVent (NVT) and Modine (MOD) sell the infrastructure.
Vertiv, nVent and Modine all sell into the AI liquid-cooling shift, but their growth, margins and customer concentration are not the same. A sourced, company-by-company comparison.
Four states now publish how much announced data center demand they actually expect. All four throw out most of it.
Between December 2025 and August 2026, utilities and grid operators in four states each published their own count of how much announced data center demand they expect to serve. Seven filings, no shared method, and every one of them removes most of what it was asked for. None of the figures are new; the pattern across them is.
For the first time, more money is going into running AI than building it. What that means for Nvidia (NVDA), Broadcom (AVGO), Marvell (MRVL) and AMD
Inference, running AI models, now costs more than training them, and that rewards custom chips and memory over raw GPUs. Here's what it means for Nvidia, Broadcom, Marvell, AMD and Micron.
An AI model trains across 100,000 chips that all have to talk at once. The stocks that wire them: Arista (ANET), Broadcom (AVGO), Coherent (COHR) and Astera Labs (ALAB)
Tens of thousands of GPUs have to act like one machine, and the network that connects them is a fast-growing slice of every AI buildout. Here's what Arista, Broadcom, Marvell, the optics makers and Astera Labs each do.
Kratos' CEO had to announce his $19 million KTOS sale before he made it. That filing is a Form 144.
Kratos CEO Eric DeMarco sold $19.3 million of KTOS stock last week, and a Form 144 flagged it first. Here is what that notice is, how it differs from a Form 4, and why a planned sale is not the warning it looks like.
AI GPU arrives in weeks. The power gear behind it takes years: GE Vernova (GEV), Vertiv (VRT), Eaton (ETN), Quanta (PWR) and Powell (POWL)
The chip is the easy part. Data centers are stuck waiting on turbines, transformers and switchgear that take years to build. Here's what GE Vernova, Vertiv, Eaton, Quanta and Powell each sell into that shortage, and how big their order books have gotten.
The oddest stock in Trump's portfolio is Korean: 18 Coupang (CPNG) trades as Washington challenged Seoul
Trump's disclosures show 18 Coupang (CPNG) trades across two accounts in eight months, the biggest of them landing while his own administration was accusing Seoul of persecuting the company.
How to track what Congress, Hedge Funds and Insiders are buying and selling.
Congress, hedge funds and company insiders all have to disclose their trades. Here is where each one files, what the timing means, and where to watch all three live.
Unitree's $1.2 trillion IPO frenzy says China is winning the robot race. Here's the US stock trying to catch up (CCXI)
China's Unitree IPO was oversubscribed 8,288 times and the US is behind, so the money will come. Agility Robotics (CCXI) is the highest-upside US humanoid play, and here's how to weigh it against TSLA, NVDA and TER.
President Donald Trump bought Snowflake (SNOW) before it doubled. The filing tells a different story.
President Trump's disclosure shows three Snowflake (SNOW) trades in 17 days: a buy, a sell, and a buy. Walking the full record, rather than a single-line alert, shows why the round trip points to an automated model, not an insider bet.
Max your 401k match, Roth IRA and HSA before you touch a single stock. Index funds come next, individual stocks come last.
The order I'd actually go in: 401k match, then Roth IRA and HSA, then a broad index fund (or X Money if you want zero market risk), then mega-caps and dividend ETFs, then single stocks last.
How to buy Sivers Semiconductors stock (SIVEF) from the US, and the broker that won't sell it to you
SIVEF is Sivers Semiconductors' ticker for US brokerage accounts, but Robinhood doesn't carry it. Here is which brokers do, how the OTC price compares to the Stockholm shares, and the silver ETF ticker easy to mix it up with.
Kioxia is the memory chip maker that passed Toyota as Japan's most valuable company, then fell 66%. Here's who owns it
Kioxia is the former Toshiba Memory, and it makes NAND flash and nothing else. Toshiba still holds 15.10% and keeps selling, an SK Hynix (SKHY) vehicle holds 14%, and Sandisk (SNDK) co-owns the factories. What the company makes, who owns it, and how a US investor can reach it.
What is a pod shop? Millennium didn't buy your stock. One of its 340 teams did.
Citadel's last quarterly filing listed 15,589 positions. Millennium runs more than 340 separate investment teams and Point72 more than 200, which changes what a hedge fund stake in your stock actually means.
SK Hynix (SKHY) sells the memory in Nvidia's (NVDA) Rubin racks. SK Group is committing $1.44T USD to the chips and data centers around them.
Nvidia and SK Hynix signed a multiyear memory partnership with no dollar figure attached. SK Group then committed 2,100 trillion won ($1.44T USD) to chip capacity and 15 gigawatts of AI data centers, built on Nvidia's Vera Rubin reference design. Nvidia put $1 billion into Naver on July 24. Here is what each side actually committed, and what is funded versus announced.
Nvidia (NVDA) and Microsoft (MSFT) don't just sell OpenAI chips and cloud time. They also fund the bill.
Nvidia, Microsoft, Oracle, Broadcom, AMD, and CoreWeave have promised OpenAI close to a trillion dollars combined, and some of them are OpenAI's investors as well as its vendors. Here's how the money actually loops, and where it's already showing strain.
SK Hynix in Korea moved from down 5.8% to up 2.7% to down 4.2%. Here is why a leveraged bet on that day would have hurt even more
SK Hynix's Korea-listed shares and the Kospi moved through a huge range and still closed down more than 4% on Monday. Here is the math on why a 2x leveraged position on a day like that is more dangerous than it looks, even after a partial recovery.
An executive can schedule a stock sale 120 days before they even know what's coming
Ontrak's former CEO went to prison for misusing a 10b5-1 trading plan, the same legal tool that lets most executives schedule stock sales months in advance. Here's how the plan is supposed to work, why the SEC tightened it in 2022, and how to tell a real scheduled sale from one that wasn't.
RoboStrategy (BOT) holds pieces of Figure AI and Apptronik. It just registered shares tied to a $2 billion stock deal, eight times its own size.
RoboStrategy trades on Nasdaq as BOT and holds private stakes in Figure AI, Apptronik and 12 other robotics startups. Two months after its IPO, it can now sell $2 billion in new shares, about eight times the fund's current size. Here's how the deal works and what it means for existing shareholders.
Korea-listed Samsung and SK Hynix ETFs are built to sell when the market drops. That is why the Kospi keeps crashing at the close.
A 2x leveraged ETF is designed to sell more every time its stock falls, and it does this near the market close. When the stock is Samsung or SK Hynix, each of which is a huge share of the Kospi, that automatic selling drags down the whole index. Here is how single-stock leverage ETFs have been quietly amplifying Korea's crashes.
Only about 10 members of Congress use a blind trust. Here's why almost nobody bothers.
A blind trust sounds like the simple fix for a lawmaker owning stock while writing the laws that move it. Only about 10 sitting members of Congress actually have one. Here is what a real blind trust requires, why so few bother, and whether it even does what people think it does.
Should you actually copy stocks bought by hedge funds, Congress, or insiders? What the data really says
Copying stocks bought by Congress, hedge funds, and company insiders all sound like easy shortcuts. Here's what the actual research says happens once you try each one, and why the delay before you see the trade matters more than people think.
Bitcoin miners are becoming AI landlords. Here's how far each one has actually gotten.
Eight bitcoin miners are pitching the same AI pivot, but they're nowhere near equally far along. IREN and TeraWulf already have AI revenue flowing. Hut 8, Cipher and Applied Digital have billions in signed leases that haven't started billing yet. CleanSpark still just mines bitcoin.
Why KOSPI moves so violently: two chip stocks, half the market, and 10x leverage
Samsung and SK Hynix are now nearly half of KOSPI, single stocks can move 30% in a day, and Korean retail investors trade with leverage tools that go up to 10 times their money. Here is how those three things combine into one of the world's most violent stock markets.
Inside the AI hardware stack, from Nvidia's chips to the grid that powers them
An AI data center is seven layers of hardware: GPUs, memory, storage, CPUs, networking, manufacturing, and power. Here's the full map, with the public companies behind each layer and where the bottlenecks actually are.
What is a 13D filing? Why investor stakes keep landing at 19.9%, not 20%
Schedule 13D and Schedule 13G both mean an investor crossed 5% of a company. The form they choose signals what they plan to do next, and it explains why big stakes keep landing at exactly 19.9%.
The government is banking on drones becoming the future of warfare. The stocks got crushed anyway
Ukraine is fighting with cheap, disposable drones and the Pentagon wants nearly $75 billion for unmanned systems next year. AeroVironment, Kratos, Red Cat, Ondas, Unusual Machines, and AIRO are all down 45% to 65% anyway. Here's why.
Why options really do lose value fast on Fridays, and it's not a Wall Street conspiracy
It feels like your option loses value the moment Friday shows up, and a lot of traders assume institutions are rigging it against them. The real explanation, theta decay and how market makers hedge, is less sinister and more useful to actually understand.
What is a SPAC? DraftKings, Lucid and the Agility Robotics deal (CCXI), explained
A SPAC skips the normal IPO process by merging a private company into an already-public shell. Here is how that actually works, and what happened to the famous ones, from DraftKings to Lucid to the Agility Robotics deal (CCXI) moving through the pipeline right now.
What is an AI neocloud? CoreWeave (CRWV) and Nebius (NBIS), explained
Neoclouds like CoreWeave and Nebius buy GPUs with debt and rent out the computing power to AI companies. Here is how the business model works, and the risk built into it.
Every trade a CEO makes in their own stock goes public within 2 days. Here's how to read a Form 4.
Corporate insiders must disclose their own stock trades within two days. Here's what a Form 4 actually shows, using two real filings, and why most insider selling isn't the warning sign it looks like.
What are stock futures, and what do they actually predict?
S&P and Nasdaq futures trade almost around the clock and set the tone before the opening bell. What a futures contract actually is, why tech futures swing harder, and how much you should trust them.
What is the VIX? The market's fear gauge, explained
The VIX measures how much movement options traders expect in the S&P 500, not which direction it moves. Here is what counts as low or high, how investors actually use it, and the real risks in trying to trade volatility directly.
What is HBM? The memory chips powering the AI boom
Only three companies make high bandwidth memory, the chips every AI accelerator depends on, and supply is sold out through 2026. What HBM is, who makes it, and how to invest in it.
How to buy SK Hynix stock (SKHY), the leveraged tickers, and two symbols that no longer work
SK Hynix trades on the Nasdaq under SKHY, and any US brokerage account can buy it. Here is how to place the order, which stocks actually give you this trade, the six leveraged tickers, and why the leveraged ones lost more than double.
How to read an earnings report: EPS, margins, and what actually matters
Earnings reports look like a wall of numbers. Here is how to read the lines that matter, from revenue and EPS to margins, guidance, and whether a stock is cheap or expensive.
Do politicians actually beat the stock market? What the data says
Nancy Pelosi, David Rouzer, Ro Khanna and more: do members of Congress really beat the stock market? What the research and the yearly reports actually show, and whether copying their trades works.
How to track stock trades by Congress and the president
A plain guide to how politicians disclose their stock trades: the STOCK Act, which forms to read (PTR, OGE 278-T, 13F, Form 4), where to find them for free, and how to read them without fooling yourself.
AI investing glossary: the jargon behind every AI stock, explained
A plain-English glossary of the jargon in AI-stock coverage: GPU, HBM, foundry, neocloud, hyperscaler, capex, 13F, picks and shovels, Mag 7 and more, grouped by theme with links to fuller explainers.
What is a 13F filing? How to track what hedge funds are buying (and what it leaves out)
A plain-English guide to 13F filings: what they are, the 45-day lag, what they include and leave out, how 13D and 13G stakes differ, and how to track what hedge funds are buying for free.
The hidden chokepoints behind the AI chip boom
Everyone watches Nvidia and TSMC. But the AI chip boom rests on a few obscure materials, often from one company, country, or town: ABF substrate, photoresist, high-purity quartz, neon and gallium. Who controls them, and how big the risk really is.
The government is betting billions on quantum computing, but the payoff is years away
Washington is now a quantum-computing investor, having committed about $2 billion to nine companies and taken equity stakes back in May. But the technology will not pay off for years, and the pure-play stocks are already priced for a future that has not arrived. Here is the realistic picture.
Advanced packaging is the bottleneck behind the AI chip, and the stocks that own it
Everyone watches TSMC make the AI chip, but it cannot ship without advanced packaging, the CoWoS step that bonds the GPU to its memory, and it has been sold out into 2026. Here is what advanced packaging is, why it is the real bottleneck, and the overlooked stocks behind it: Amkor (AMKR), Camtek (CAMT), Onto Innovation (ONTO) and Besi.
Monthly dividend ETFs explained: QQQI, SPYI and the safer SCHD
Covered-call ETFs like QQQI and SPYI dangle 12 to 14 percent monthly yields, but the headline number hides real risks and very different tax treatment. Here is how they actually work, what they pay, the catch, and how the safer SCHD compares.
What every space stock actually does, and why ASTS, RKLB and the rest fell after SpaceX went public
Space stocks ran up together on Golden Dome defense money, then fell together after SpaceX’s record IPO. Here is what AST SpaceMobile (ASTS), Rocket Lab (RKLB), Planet Labs (PL) and the rest of the basket actually do, and why they move as one trade.
What is a chip foundry? Why almost every AI chip is made by one company, TSMC (TSM)
Nvidia, Apple and AMD design chips but do not make them. A plain-English guide to what a semiconductor foundry is, the fabless model, why TSMC (TSM) makes around 70 percent of the world's chips, and the packaging bottleneck holding back AI.
The AI stock map: every layer of the trade, from sand to software
A top-to-bottom deep dive on the AI supply chain, from the machines that make the chips down to the hyperscalers writing the checks, and how every layer pushes and pulls on the others.