<div>
<style scoped>
    .dataframe tbody tr th:only-of-type {
        vertical-align: middle;
    }

    .dataframe tbody tr th {
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<table border="1" class="dataframe">
  <thead>
    <tr style="text-align: right;">
      <th></th>
      <th>Year</th>
      <th>S&amp;P 500</th>
      <th>Treasuries</th>
      <th>Corporates</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th>0</th>
      <td>1928</td>
      <td>0.454932</td>
      <td>0.020148</td>
      <td>0.044268</td>
    </tr>
    <tr>
      <th>1</th>
      <td>1929</td>
      <td>-0.088311</td>
      <td>0.035980</td>
      <td>0.024189</td>
    </tr>
    <tr>
      <th>2</th>
      <td>1930</td>
      <td>-0.200079</td>
      <td>0.116835</td>
      <td>0.074090</td>
    </tr>
    <tr>
      <th>3</th>
      <td>1931</td>
      <td>-0.380674</td>
      <td>0.074522</td>
      <td>-0.070178</td>
    </tr>
    <tr>
      <th>4</th>
      <td>1932</td>
      <td>0.018184</td>
      <td>0.212472</td>
      <td>0.377411</td>
    </tr>
  </tbody>
</table>
</div>

   Year   S&P 500  Treasuries  Corporates
0  1928  0.454932    0.020148    0.044268
1  1929 -0.088311    0.035980    0.024189
2  1930 -0.200079    0.116835    0.074090
3  1931 -0.380674    0.074522   -0.070178
4  1932  0.018184    0.212472    0.377411

'Means: [0.08603708 0.02143561 0.04162998]'

'Standard Deviations: [0.19335541 0.08642132 0.08661822]'

array([[0.03738632, 0.00086909, 0.00695467],
       [0.00086909, 0.00746865, 0.00520909],
       [0.00695467, 0.00520909, 0.00750272]])

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