Daily Alpha Brief — 2026-08-31 — BEAR regime across majors

Bayesian crypto brief for 2026-08-31: BEAR regime, strategy performance, weight shifts, and quant-vs-crowd sentiment across 9 symbols.

TL;DR

• Dominant regime: BEAR (4 bullish / 5 bearish of 9 symbols).
• Top signal: rsi_macd on XRP cut 0.244 (0.50 → 0.26).
• Shadow portfolio: $732 (-26.79%), 1 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 greed at 73/100; BTC dominance 59.7% signals balanced.

🌐 Market Overview

Economic (FRED):

Stablecoin dominance 9.8% (risk-on); yield curve regime Flat.

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

Economic Calendar: Next FOMC: in 16 days | Next CPI: in 11 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: 4 BULL / 5 BEAR of 9 symbols.

🔗 Correlation Signals

Stable pairs (r > 0.70): DOGE/SUI: r=0.89 ✅ | SUI/AVAX: r=0.89 ✅ | XRP/DOGE: r=0.88 ✅ | XRP/SUI: r=0.87 ✅ | DOGE/AVAX: r=0.87 ✅ | BTC/ETH: r=0.87 ✅

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

XRP/USDT (BEAR):

rsi_macd is the clearest cut: 7d win-rate of 23% (rule 2) with a catastrophic Sharpe of -10.19 and -801 pnl drives it down to 0.20; volume_spike similarly posts 28% win-rate and -7.34 Sharpe over 50 trades, warranting a deep cut to 0.15. Bollinger is the standout with 7d Sharpe of 4.33 and +310 pnl over 50 trades (rule 4), and though the 24h print is ugly its weekly consistency justifies holding close to current weight at 0.58; in a BEAR regime mean-reversion receives a modest regime boost. ema_cross and walk_forward_ema both show negative 7d Sharpe and losses despite a good 24h fluke (rule 6 conflict: data overrides regime momentum prior), so both are trimmed; tsmom has zero trades (rule 1, held near current); post_shock_reversal has 7d Sharpe of -0.72 with negative pnl so a small cut applies; sentiment_strategy holds near current on thin but 100%-confluent 7d coverage with near-zero composite, warranting slight caution; correlation_strategy and macro_strategy have no trades and stay near current weight.

BTC/USDT (BULL):

Nearly every price-based strategy is deeply unprofitable on 7d with large negative Sharpes, triggering rules 2-3 across the board: rsi_macd (7d 0% win, Sharpe -11.99), volume_spike (31% win, Sharpe -7.98, pnl -211), post_shock_reversal (31% win, Sharpe -4.16, pnl -187), and walk_forward_ema (32% win, Sharpe -2.06) are all cut hard; tsmom has only 2 7d trades so rule 1 caps movement near current but negative Sharpe warrants a modest cut. Bollinger is a BULL-regime underperformer with 31% win and Sharpe -3.23 (band-walk casualty), so it is cut significantly despite some regime-multiplier support; ema_cross has the best relative 24h showing (50% win, Sharpe 3.81) but its 7d Sharpe of -1.31 on 36 trades still signals rule 3 — I hold it closest to neutral among price strategies while acknowledging the 7d data wins over the single-day print. Sentiment_strategy had 7d coverage of 3 sources with 100% confluence and a mildly positive composite, justifying a modest hold near current; correlation_strategy and macro_strategy report zero signals on both windows, so they are held at their current weights per the no-signal guidance.

SOL/USDT (BULL):

Bollinger is the standout performer with 7d Sharpe of 13.22 and +1013 pnl despite a BULL regime where mean-reversion is disfavoured — the data overwhelmingly overrides the regime prior (rule 4/6), so it earns the largest boost toward 0.80. rsi_macd has a negative 7d Sharpe and win-rate below 35% despite being momentum-aligned with the BULL regime, so it is cut significantly from its inflated 0.718 (rule 3 conflict); ema_cross, volume_spike, walk_forward_ema, and tsmom all show deeply negative 7d Sharpe and pnl with win-rates well below 30%, warranting cuts toward 0.10-0.18 per rules 2-3. post_shock_reversal keeps a moderate weight at 0.45 given its positive 7d Sharpe (2.48) and pnl (+207), though 24h deterioration prevents a full raise; sentiment_strategy is held near neutral at 0.50 given 24h source coverage of zero and only a near-zero avg_composite on 7d, while correlation_strategy and macro_strategy both report zero trades across all windows and are held near their current weights per the sparse-data guidance.

📡 Signal Outlook

💼 Shadow Portfolio

Open positions:

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

📡 Discourse Radar

Sentiment analysis pipeline launching soon.

📈 System Architecture

The four-panel Bayesian fusion engine behind these daily decisions (shown Mondays). See Methodology.

Academic Footnote

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

Disclaimer

This is algorithmic analysis only, not financial advice.