The Entity List is the US Commerce Department’s register of foreign companies, institutes and people that need a special license before they can receive items subject to US export rules. It is run by the Bureau of Industry and Security (BIS) and it has become the main tool Washington uses to slow China’s progress in chips, supercomputing, AI and surveillance technology. Since 2019, BIS has added many hundreds of Chinese entries.

High bandwidth memory (HBM) is DRAM built as a tower. Eight, twelve or sixteen memory dies sit on top of a logic base die, wired together vertically, and the whole stack is placed a few millimetres from a GPU or AI accelerator inside the same package. The reason is bandwidth. One HBM4 stack moves at least 2 terabytes per second, more than three times what a 12-channel DDR5-6400 server socket manages (about 614 GB/s).

Huawei is the company the US has spent the most effort trying to contain. In 2019 it was the world’s largest telecom equipment maker and was about to pass Samsung as the biggest smartphone vendor. Seven years of US measures later it is still huge, still profitable and now building its own chips, operating system and AI accelerators. Both halves of that sentence are true, and the timeline below shows how.

Hybrid bonding joins two chips by pressing their polished faces together so that copper pads on one fuse directly with copper pads on the other. There is no solder, no bump and no gap. The name comes from the two bonds made at once: the insulating surfaces stick to each other, and the embedded copper pads weld into continuous metal. Because nothing sits between the dies, connections can be packed far closer together than solder allows, and stacks get thinner and cooler.

A leveraged ETF promises a multiple of an index’s return for one day. A 3x fund on the Nasdaq-100 aims to rise 3 percent when the index rises 1 percent on a given day, and to fall 3 percent when it falls 1 percent. An inverse fund does the same with a minus sign. The key words are “for one day”. Over a week, a month or a year the fund can return far more or far less than three times the index, and in a choppy market it can lose money while the index goes nowhere.

A maritime chokepoint is a narrow passage that a large share of seaborne trade has to pass through because the alternatives are much longer or don’t exist. Five matter most to world trade: the Strait of Hormuz, the Bab el-Mandeb, the Suez Canal, the Strait of Malacca and the Panama Canal. They differ a lot. Hormuz is about energy, Malacca about sheer volume, Suez and the Bab el-Mandeb work as one Europe-Asia corridor, and Panama is a freshwater-fed canal that fails in droughts.

Market breadth measures how many stocks are taking part in a move. An index like the S&P 500 is weighted by market value, so a handful of giant companies can push it to a record while most of its members go nowhere or fall. Breadth indicators strip the weighting out. They count stocks: how many rose, how many fell, how many hit new highs, how many sit above a moving average.

Matter and Thread are two separate standards that usually get mentioned in the same breath, and mixing them up is the source of most smart home confusion. Matter is an application language: it defines what a light, lock or thermostat is and how an app tells it what to do. Thread is a low-power wireless mesh network that carries some of that traffic. A Matter device can run over Thread, over WiFi or over Ethernet.

The US military runs several alert scales at once, and they measure different things. DEFCON is about readiness for war, nuclear war included. FPCON is about protecting bases and people from terrorist attack. MOPP tells troops how much chemical protective gear to wear. EMCON controls how much a ship or unit transmits. A base can sit at a raised FPCON while DEFCON hasn’t moved at all; a destroyer can go radio-silent under EMCON with no change in either.

Military units pass two kinds of message: orders going down the chain and reports coming up. Both use fixed formats. The point is speed and completeness under stress. A tired platoon leader on a bad radio link doesn’t have to think about what to say next, and the person receiving the message knows exactly where to look for the grid reference. The formats also turn up far outside the army: emergency services, humanitarian agencies and corporate crisis teams all borrow the SITREP.