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DailyGDYN — GRID DYNAMICS HOLDINGS, INC.
One page for what GRID DYNAMICS HOLDINGS, INC. filed, what drew public attention, and how one simple trend rule behaved on its IEX history. The backtest includes trading costs and keeps its two biggest biases in plain sight.
What the latest filing says
Attention and positioning
A rolling tape from public sources. If a card is missing, that feed has no usable observation for this ticker. We do not turn “missing” into zero.
share of daily volume sold short on FINRA-reported venues · through 2026-08-24
Sources: Wikimedia pageviews (CC0); Derived from FINRA Reg SHO daily short sale volume files; SEC Form 4 filings (public domain); Derived from the GDELT Project (GKG). Extract generated 2026-08-25.
A deliberately simple test: close above the 200-day average
The simulation stays long while the IEX closing price is above its 200-day moving average and moves to cash below it. It charges 15 bps per leg — entry and exit — so a round trip costs 30.0 bps.
The catch: it acts on the same close that creates the signal, which is not realistically tradable, and it only tests a company that survived into today’s universe. Both choices can make the result look better than it was.