the.com/sectors
the market's astrology — twelve houses telling you which stocks feel the same mood swing.
means a way of grouping companies by what they actually do, so investors can bet on industries instead of picking single stocks.
from from latin secare, to cut — geometry's pie-slice sense was borrowed by economists in the 20th century to carve the economy into comparable chunks, later formalized by index providers like GICS in 1999.
gics counteleven official sectors, revised occasionally by committee
tech dominanceone sector now often exceeds a quarter of the s&p 500
real estate splitbecame its own sector only in 2016, leaving finance
rotation strategytraders shift money between sectors chasing economic cycles