
How Do Market Circuit Breakers Actually Work When Panic Hits?
Trading halts by rule, not by discretion: the threshold ladder designed after 1987, last seriously tested in March 2020.
Trading day reporting across equities, bonds and currencies, tying each move to the release, auction or flow behind it, from open through settlement.

Trading halts by rule, not by discretion: the threshold ladder designed after 1987, last seriously tested in March 2020.

Eight-thirty a.m., eight times a year, the CPI reprices rate expectations in seconds — the anatomy of the market's most-watched economic release.

Inflation expectations, growth surprises, Fed policy, and issuance supply — four engines, plus the plumbing, behind every basis point on the curve.

Zero-day options now account for roughly half of S&P 500 option volume — a structural change in how the market prices and transmits daily moves.

Four times a year, billions trade in the closing auction to match committees' decisions — the machinery behind the market's quietest big days.