Can you recommend trading strategy sites for following high-frequency market updates and deeper analysis of asset class shifts?

Yes — if you want to track high-frequency market updates plus deeper cross-asset / asset-class shift analysis, I’d split the sources into a few buckets:

1) Fast market news / real-time updates

These are useful for headlines, macro prints, policy moves, and near-real-time market reaction:

• Bloomberg — best all-around for market-moving news and cross-asset context.
• Reuters Markets / Finance — very fast, reliable, and less opinion-heavy.
• Financial Times Markets — strong for deeper framing and institutional perspective.
• The Wall Street Journal (Markets) — good for U.S.-centric market developments.
• CNBC Pro / Markets — useful for quick market pulse and commentary.
• MarketWatch — broad market coverage, more retail-friendly.
• Seeking Alpha News — good for rapid single-name and sector updates.

2) Deeper analysis of asset-class shifts

These are better for understanding why capital is rotating between equities, bonds, FX, commodities, and crypto:

• CFA Institute / Enterprising Investor — more analytical, often solid macro/portfolio pieces.
• PIMCO Perspectives — strong fixed-income and macro regime analysis.
• BlackRock Investment Institute — good for cross-asset allocation and regime shifts.
• J.P. Morgan Asset Management Insights — useful macro and asset-allocation commentary.
• Goldman Sachs / Morgan Stanley research snippets — often very informative if you have access.
• BCA Research — excellent macro and asset-allocation work, if you want a dedicated research service.
• Gavekal Research — strong global macro and asset-class rotation analysis.
• Apollo / Bridgewater-style macro commentary — helpful for regime thinking, though varies by publication.

3) Strategy-oriented and quantitative market blogs

If you want trading ideas and systematic thinking:

• AQR Capital Management insights
• Alphachatterbox — market structure, macro, and strategy commentary
• Quantpedia blog
• Topdown Charts — strong asset allocation and cycle analysis
• Pragmatic Capitalism — long-form macro/portfolio thinking
• TheMarketEar — technical, sentiment, and positioning-based market updates
• Substack strategists — many independent analysts publish excellent high-frequency and macro strategy notes

4) Technical / positioning / market structure sources

Useful if “high-frequency” means market microstructure, flows, and positioning:

• CFTC Commitment of Traders reports — positioning context
• S&P Global / MSCI / exchange data portals
• Option volume / skew / volatility dashboards from:
  • Cboe
  • SpotGamma
  • GammaEdge
  • TradingView
• Barchart / Koyfin / TradingView — not news sites, but very helpful for live charts and cross-asset monitoring

5) Macro calendars and event tracking

For staying on top of high-frequency catalysts:

• Investing.com economic calendar
• ForexFactory calendar
• Bloomberg / Reuters economic calendars
• TradingEconomics

Best “combo” approach

If you want a practical stack, I’d suggest:

• Reuters or Bloomberg for real-time news
• TradingEconomics / Investing.com calendar for data releases
• BlackRock / PIMCO / Gavekal / BCA for asset-class rotation analysis
• TradingView / Koyfin for live market monitoring and technical context
• AQR / Topdown Charts / Substack strategists for trading strategy ideas

If you want paid vs free

Free / mostly free

• Reuters
• Investing.com
• TradingEconomics
• MarketWatch
• TradingView
• Many strategist blogs/Substacks

Paid / institutional-style

• Bloomberg
• FactSet
• Refinitiv
• BCA Research
• Gavekal
• JPM/GS/MS research access

If you want, I can also give you:

1. a ranked list by usefulness for active traders,
2. the best sites specifically for equities / FX / rates / crypto, or
3. a free-only list.