Daily Alpha Brief — 2026-07-31 — SIDEWAYS regime across majors

Bayesian crypto brief for 2026-07-31: 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 SUI cut 0.330 (0.84 → 0.51).
• Shadow portfolio: $744 (-25.60%), 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 58.8% 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 47 days | Next CPI: in 12 days | position-size modifier 1.00×.

📊 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=0.91 ✅ | BTC/ETH: r=0.90 ✅ | BTC/SOL: r=0.89 ✅ | SOL/XRP: r=0.86 ✅ | SOL/SUI: r=0.85 ✅ | ETH/XRP: r=0.84 ✅

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

SUI/USDT (SIDEWAYS):

Bollinger is heavily overweighted at 0.841 given its poor 7d performance (25% win rate, negative Sharpe, negative pnl), so I cut it substantially toward 0.60 — it retains a modest SIDEWAYS regime boost but the data clearly overrides a higher weight per rules 2-3. Volume_spike has a paradoxical profile: a strong positive Sharpe (2.90) and positive pnl (+106.73) but only 27% win rate, signalling a few large wins masking frequent small losses; in a SIDEWAYS regime I trim it slightly from 0.423 to 0.38 rather than reward the noisy win-rate. Post_shock_reversal shows a deeply negative 7d Sharpe (-2.17) and negative pnl (-26.57) with only 25% win rate despite the favorable 24h snapshot, so I reduce it per rule 3 to 0.18. All zero-trade strategies (rsi_macd, ema_cross, tsmom, walk_forward_ema, correlation_strategy, macro_strategy) are held near their current weights per rule 1, and sentiment_strategy is held near its current weight given sparse coverage (2 sources) and weak, low-confluence signals.

ETH/USDT (SIDEWAYS):

Most strategies have zero 7d trades and are held within +/-0.05 of their current weights per rule 1 (low-sample guard), with zero-trade strategies nudged slightly toward 0.50 per the decay component. Volume_spike has 80 7d trades but a 30% win-rate with negative PnL character (rule 2 applies partially) tempered by an anomalously high Sharpe that likely reflects skewed pnl distribution, so it is reduced meaningfully from 0.712 toward 0.55; in SIDEWAYS it still earns a small regime bump per rule 5. Post_shock_reversal shows 51 7d trades with 35% win-rate but massive positive pnl and a very high Sharpe (14.67), consistent with a mean-reversion edge that fits the SIDEWAYS regime — the win-rate is below 55% so rule 4 does not fully fire, but positive risk-adjusted returns and regime alignment justify a modest hold near current rather than a cut; it is nudged slightly down from 0.650 to 0.58 due to the sub-50% win-rate. Walk_forward_ema has 13 7d trades with 23% win-rate and negative 24h Sharpe, warranting a reduction from 0.657 toward 0.50; sentiment_strategy has stable 3-source coverage with moderate confluence (67%) and a mildly positive composite, warranting a small hold near current at 0.54.

BNB/USDT (SIDEWAYS):

rsi_macd, ema_cross, tsmom, walk_forward_ema, correlation_strategy, and macro_strategy all have zero trades on both windows, so rule 1 applies and weights are held at current. Bollinger has adequate 7d sample (19 trades) but a 37% win-rate falls below the 55% threshold for a boost; the Sharpe is inflated and unreliable, and 37% win in a SIDEWAYS regime where mean-reversion should shine is a mild disappointment, so I trim it slightly from 0.644 toward 0.58 per rule 3’s spirit while keeping it regime-favoured. Volume_spike has 62 trades on 7d but only a 23% win-rate — well below the 30% persistent-underperformance threshold (rule 2) — so I cut it from 0.341 to 0.30; the strong 24h surface metrics are noise relative to the weak 7d reality. Post_shock_reversal is a mean-reversion strategy suited to SIDEWAYS with a strong 7d Sharpe and positive pnl, but the 24h window shows negative Sharpe and 27% win, introducing conflict; I hold it nearly flat at 0.62, slightly trimmed from 0.624, deferring to the 7d positive signal while respecting the 24h caution. Sentiment_strategy has only 33% confluence across 3 sources and a near-zero composite, indicating weak and contradictory signals, so I nudge it down slightly to 0.46.

📡 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: -1.00 (bearish crowd).
• Macro signal (FT/Fed/CNBC): +0.01 (neutral) — “Bank of England holds rates amid uncertainty over energy shock”.

Most-talked alt: WIF/USDT at -1.00 (bearish crowd lean).

📰 Today’s Key Reads

Curated from 3 sources monitored today:

🔴 ‘Sleepy July’: K33 says bitcoin spot volume on track for weakest month since late 2023 — theblock — Score: -0.77

🟢 Quantum Solutions loses top Japan ETH treasury spot after another $1.9 million sale — theblock — Score: +0.66

🟢 Ether, XRP flat as chip stocks steady on Samsung’s 250-fold profit surge — coindesk — Score: +0.44

🟢 SpaceX is a battleground Solana must win — coindesk — Score: +0.27

⚠️ Bank of England holds rates amid uncertainty over energy shock — ft_markets — Score: -0.19

Academic Footnote

Fang et al. (2020) — a survey of cryptocurrency trading strategies.

Disclaimer

This is algorithmic analysis only, not financial advice.