Daily Alpha Brief — 2026-07-28 — SIDEWAYS regime across majors

Bayesian crypto brief for 2026-07-28: SIDEWAYS regime, strategy performance, weight shifts, and quant-vs-crowd sentiment across 9 symbols.

TL;DR

• Dominant regime: SIDEWAYS (0 bullish / 1 bearish of 9 symbols).
• Top signal: bollinger on ETH cut 0.275 (0.66 → 0.39).
• Shadow portfolio: $744 (-25.59%), 0 open, 35% win rate.

Shadow portfolio value since inception (dashed line = $1,000 starting capital).

Current Bayesian reliability weights, averaged across the universe.

Detected regime per symbol (EMA200 + ADX); % = lead-strategy conviction.

🌐 Market Indices

Crowd reads fear at 38/100; BTC dominance 58.7% signals balanced.

🌐 Market Overview

Economic (FRED):

Stablecoin dominance 11.1% (risk-off, money fleeing crypto); yield curve regime Flat.

Funding Rates (contrarian — heavy positive = crowded longs to fade):

Economic Calendar: Next FOMC: in 1 day | Next CPI: in 15 days | position-size modifier 0.60×.

📊 Regime Analysis

Regime per symbol from EMA200 + ADX on daily candles, with the fusion signal.

The book is broadly bearish: 0 BULL / 1 BEAR of 9 symbols.

🔗 Correlation Signals

Stable pairs (r > 0.70): ETH/SOL: r=0.87 ✅ | BTC/ETH: r=0.86 ✅ | BTC/SOL: r=0.83 ✅ | ETH/BNB: r=0.83 ✅ | BTC/BNB: r=0.81 ✅ | ETH/XRP: r=0.78 ✅

Index signals: BTC dominance NEUTRAL → no rotation; Fear & Greed contrarian NONE.

⚙️ Strategy Performance

Aggregate 7-day performance per strategy (replayed across the universe). Edge = win-rate × avg P&L per trade — the table is sorted by it.

All P&L figures normalized to a 100 USDT position size for comparability (not summed across symbols).

🧠 Bayesian Weight Shifts

ETH/USDT (SIDEWAYS):

Bollinger is the most urgent cut: despite being regime-favoured in SIDEWAYS, its 7d metrics are deeply negative (27% win-rate, -1.43 Sharpe, negative pnl), triggering rules 2 and 3 — conflict rule 6 overrides the regime prior and I reduce it substantially from 0.661 toward 0.38. Volume_spike is the standout performer with 77 trades, a 9.82 Sharpe, and +325 pnl on 7d, earning a raise to 0.75 per rule 4 and the SIDEWAYS regime bump. Post_shock_reversal has a strong 24h Sharpe but only 29% 7d win-rate with modest pnl, so I hold it near neutral at 0.50 rather than rewarding the noisy intraday spike. All zero-trade strategies (rsi_macd, ema_cross, tsmom, walk_forward_ema, correlation_strategy, macro_strategy) are kept within a tight band of their current weights per rule 1; sentiment_strategy is nudged slightly down from 0.525 to 0.48 reflecting weak 7d confluence (33%) and a near-neutral composite signal.

XRP/USDT (SIDEWAYS):

post_shock_reversal is the dominant mover: 7d win-rate of 24% with a Sharpe of -4.87 and -140 pnl across 68 trades is strongly significant data, triggering rule 2 and rule 3 simultaneously, so I cut it sharply from 0.488 toward 0.15 (rule 7 caps the single-night move). Bollinger has 8 trades on 7d but a 25% win-rate and -1.66 Sharpe with negative pnl, so despite the SIDEWAYS regime favouring mean-reversion I must apply rule 6 (data overrides regime prior) and reduce it from 0.462 to 0.35; the 24h anomalous Sharpe of 8.42 on only 2 trades is noise and ignored. All remaining price-strategy lines show zero trades (rule 1 low-sample guard), so rsi_macd, ema_cross, tsmom, walk_forward_ema, volume_spike, correlation_strategy, and macro_strategy are each held within ±0.01 of their current weights. sentiment_strategy shows consistent 3-source coverage and 67% confluence across both windows with a mildly positive composite, warranting a small nudge up to 0.64 from 0.662 rounded slightly down to reflect only modest signal strength.

SUI/USDT (SIDEWAYS):

Bollinger is the only price-based strategy with meaningful data in this SIDEWAYS regime, posting positive 7d pnl (+114) and an acceptable win-rate trend in the 24h window, so it earns a modest raise to 0.58 per rule 4 and regime alignment — the very high Sharpe figures are likely scale artifacts but the positive pnl and regime fit justify the increase. Volume_spike is a clear persistent loser: 87 trades over 7d with only 21% win-rate, deeply negative Sharpe (-8.64) and negative pnl (-336), triggering rules 2 and 3 for a hard cut to 0.15; post_shock_reversal similarly has <30% win-rate with negative Sharpe and negative pnl, cut to 0.15 per rules 2-3. All zero-trade strategies (rsi_macd, ema_cross, tsmom, walk_forward_ema, correlation_strategy, macro_strategy) are held at their current weights per rule 1; sentiment_strategy is nudged slightly down to 0.44 given sparse coverage (only 2 sources) and weak confluence (50%), per sentiment weighting guidance.

📡 Signal Outlook

💼 Shadow Portfolio

$1,000 USDT paper portfolio, 1% risk/trade, MEXC fees modelled. No real capital is deployed.

📡 Discourse Radar

Crowd-vs-quant sentiment from CryptoCompare news, crypto RSS, the macro feeds (FT / Fed / CNBC), and the Fear & Greed index. (Reddit retired — Responsible Builder Policy restrictions, 2026.)

• Fear & Greed: -0.50 (bearish crowd).
• Macro signal (FT/Fed/CNBC): +0.04 (neutral) — “Shortsighted stock market can no longer brush off war: ‘It’s too hard to ignore $100 oil’”.

Most-talked alt: DOGE/USDT at +0.51 (bullish crowd lean).

📰 Today’s Key Reads

Curated from 3 sources monitored today:

⚠️ Fund firms deploy ETF ‘spaghetti cannon’ in hunt for next hot trade — ft_markets — Score: +1.00

🟢 Bitmine adds nearly 10,000 ETH while repurchasing 6.1 million common shares — theblock — Score: +0.45

🟢 Bitmine buys more ether as Tom Lee says rising ETH/BTC ratio points to stronger crypto prices — coindesk — Score: +0.38

🔴 Live updates: Bitcoin rises above $65,000 as oil tumbles on Iran war cooldown — coindesk — Score: -0.30

🟢 Bitcoin Policy Institute, Palantir and Anduril join US State Department’s Freedom Tech Excellence Program — theblock — Score: +0.24

Academic Footnote

Miralles-Quirós (2022) — post-shock reversals in digital assets.

Disclaimer

This is algorithmic analysis only, not financial advice.