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Many trading P&Ls and quantitative signals are more sensitive to data provenance and latency than most PMs acknowledge; using indicative or aggregated feeds (instead of direct exchange/top-of-book) can silently add 50–200bps of slippage to high-turnover strategies and produce backtest-to-live decay within weeks. That slippage shows up not as a single event but as persistent alpha erosion, which compounds rapidly for levered strategies — a 100bps monthly drag halves a strategy’s IR in ~7 months. The immediate winners are firms that monetize high-integrity market data and post-trade services (exchanges, consolidated-tape owners, low-latency infra vendors), while low-fee retail aggregators and boutique data resellers are exposed to reputational, regulatory and litigation risk if a headline feed failure causes outsized client losses. A forced industry upgrade (regulatory or market-driven) to higher-quality feeds would reallocate ~2–5% of trading revenues from low-cost providers to incumbent data owners over 6–18 months. Catalysts to watch are major feed outages, a high-profile execution-loss lawsuit, or an explicit regulator push for standardized tick-level data quality — any of which could compress multiples for “cheap” data vendors and rerate infrastructure owners. Conversely, rapid adoption of cloud-native consolidated tapes or cheaper synthetic feeds could blunt that repricing; these reversal mechanics play out over quarters, not days. Operationally, the path to preserving alpha is not only capex for direct feeds and co-location but also explicit line-item budgeting for data quality in P&L attribution and live-vs-backtest reconciliation. Strategies should treat data-source changes as structural events and re-run capacity/stress tests with conservative latency/slippage assumptions (add 75–150bps) before reallocating capital.
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