A. Whitney et D. Shasha, Lots o' ticks: Real-time high performance time series queries on billions of trades and quotes, SIG RECORD, 30(2), 2001, pp. 617-617
Financial mathematicians think they Can predict the future by looking at ti
me series of trades and quotes (called ticks) from the past. The main evide
nce for this hypothesis is that prices fluctuate only; by a small amount in
a given day and more or less obey the mathematics of a random walk. The hy
pothesis allows traders to price options and to speculate on stocks. This d
emonstration presents a query language and a parallel database (50-way para
llelism) to support traders who want to analyze every tick, not just end-of
-day ticks, using temporal statistical queries such as time-delayed correla
tions and tick trends. This is the first attempt that we know of to store a
nd analyze hundreds of gigabytes of time series data and to query that data
using a declarative time series extension to SQL (available at www.kx.com)
.