S&P 500 daily close-to-close log returns (^GSPC, 1928+). The canonical U.S. equity benchmark; heavy tails, volatility clustering, leverage effects.
Standard analysis sees: heavy-tailed; left-skewed; time-irreversible (sharp rises, slow decay). The atlas finds no named structure, but the source is distinctively extreme on Wasserstein:distributional_stationarity (-2.8z) — beyond what the standard bank predicts for it.
Wasserstein:distributional_stationarity | -2.8z | bank-miss 1.3σ |
Mostow Rigidity:distance_rigidity | -2.6z | bank-miss 1.9σ |
Nonstationarity:ac1_trend | -2.4z | bank-miss 1.3σ |









_(centered)/signed_log_z/S&P_500_Returns.png)
_(centered)/xy_path/S&P_500_Returns.png)

/barcode/S&P_500_Returns.png)
/d_curve/S&P_500_Returns.png)








/phi_spectrum/S&P_500_Returns.png)










/default/S&P_500_Returns.png)
/default/S&P_500_Returns.png)


| Nearest neighbor | Distance | |
|---|---|---|
| Nikkei Returns | 2.88 | |
| BTC Returns | 2.97 | |
| MFPT Inner Unloaded | 3.07 | cross-origin |
Catch24 › Catch24:CO_trev_1_num | rank 4/306 | 2.2184 |
Catch24 › Catch24:DN_HistogramMode_10 | rank 303/306 | -1.0352 |
Catch24 › Catch24:DN_HistogramMode_5 | rank 303/306 | -1.0158 |
Cayley › Cayley:growth_exponent | rank 3/306 | 2.0601 |
Cayley › Cayley:spectral_gap | rank 3/306 | 0.0316 |
Cayley › Cayley:saturation_radius | rank 306/306 | 0.0080 |
Nonstationarity › Nonstationarity:ac1_trend | rank 302/306 | -0.1685 |
Wasserstein › Wasserstein:distributional_stationarity | rank 303/306 | 0.8328 |