Xboost training

notebooks/models/spy_xgb_v1.json

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truncated

notebooks/models/spy_xgb_v1_meta.json

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+{
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+  "feature_cols": [
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+    "TLT_ret_10",
+    "USO_ret_5",
+    "SPY_TLT_ratio_ret",
+    "SPY_ret_5",
+    "SPY_ret_20",
+    "SPY_dist_sma50"
+  ],
+  "last_trained_date": "2026-07-17 00:00:00"
+}