diff --git a/experiments/playgroung.ipynb b/experiments/playgroung.ipynb
deleted file mode 100644
index 12e1f15..0000000
--- a/experiments/playgroung.ipynb
+++ /dev/null
@@ -1,492 +0,0 @@
-{
- "cells": [
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from utils import *\n",
-    "import pandas as pd\n",
-    "\n",
-    "# autoreload    \n",
-    "%load_ext autoreload\n",
-    "%autoreload 2"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "prices = pd.read_csv(\"../data/prices.csv\", index_col=0, parse_dates=True)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 7,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "0.1414213562373095"
-      ]
-     },
-     "execution_count": 7,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "np.sqrt(0.02)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 4,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "returns = synthetic_returns(prices)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 6,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "returns2 = prices.pct_change()"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 8,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "array([[1.        , 0.14747197],\n",
-       "       [0.14747197, 1.        ]])"
-      ]
-     },
-     "execution_count": 8,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "np.corrcoef(returns2.dropna().values.flatten(), returns.dropna().values.flatten())"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 7,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/html": [
-       "<div>\n",
-       "<style scoped>\n",
-       "    .dataframe tbody tr th:only-of-type {\n",
-       "        vertical-align: middle;\n",
-       "    }\n",
-       "\n",
-       "    .dataframe tbody tr th {\n",
-       "        vertical-align: top;\n",
-       "    }\n",
-       "\n",
-       "    .dataframe thead th {\n",
-       "        text-align: right;\n",
-       "    }\n",
-       "</style>\n",
-       "<table border=\"1\" class=\"dataframe\">\n",
-       "  <thead>\n",
-       "    <tr style=\"text-align: right;\">\n",
-       "      <th></th>\n",
-       "      <th>T0</th>\n",
-       "      <th>T1</th>\n",
-       "      <th>T3</th>\n",
-       "      <th>T4</th>\n",
-       "      <th>T5</th>\n",
-       "      <th>T6</th>\n",
-       "      <th>T7</th>\n",
-       "      <th>T8</th>\n",
-       "      <th>T9</th>\n",
-       "      <th>T10</th>\n",
-       "      <th>...</th>\n",
-       "      <th>T89</th>\n",
-       "      <th>T90</th>\n",
-       "      <th>T92</th>\n",
-       "      <th>T93</th>\n",
-       "      <th>T94</th>\n",
-       "      <th>T95</th>\n",
-       "      <th>T96</th>\n",
-       "      <th>T98</th>\n",
-       "      <th>T99</th>\n",
-       "      <th>T100</th>\n",
-       "    </tr>\n",
-       "  </thead>\n",
-       "  <tbody>\n",
-       "    <tr>\n",
-       "      <th>2000-01-04</th>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>...</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2000-01-05</th>\n",
-       "      <td>-0.001454</td>\n",
-       "      <td>0.000380</td>\n",
-       "      <td>0.005909</td>\n",
-       "      <td>0.003457</td>\n",
-       "      <td>-0.005594</td>\n",
-       "      <td>-0.005661</td>\n",
-       "      <td>0.006896</td>\n",
-       "      <td>0.000760</td>\n",
-       "      <td>0.001963</td>\n",
-       "      <td>0.007932</td>\n",
-       "      <td>...</td>\n",
-       "      <td>0.007658</td>\n",
-       "      <td>-0.003752</td>\n",
-       "      <td>-0.001921</td>\n",
-       "      <td>-0.001777</td>\n",
-       "      <td>-0.000561</td>\n",
-       "      <td>0.002421</td>\n",
-       "      <td>-0.000910</td>\n",
-       "      <td>-0.005058</td>\n",
-       "      <td>0.005528</td>\n",
-       "      <td>0.001457</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2000-01-06</th>\n",
-       "      <td>-0.005067</td>\n",
-       "      <td>-0.001687</td>\n",
-       "      <td>0.000715</td>\n",
-       "      <td>-0.000934</td>\n",
-       "      <td>-0.000332</td>\n",
-       "      <td>0.001453</td>\n",
-       "      <td>0.002840</td>\n",
-       "      <td>-0.000088</td>\n",
-       "      <td>-0.000333</td>\n",
-       "      <td>-0.001227</td>\n",
-       "      <td>...</td>\n",
-       "      <td>-0.004984</td>\n",
-       "      <td>-0.002119</td>\n",
-       "      <td>0.002004</td>\n",
-       "      <td>-0.001833</td>\n",
-       "      <td>0.002670</td>\n",
-       "      <td>0.001595</td>\n",
-       "      <td>-0.005330</td>\n",
-       "      <td>0.002026</td>\n",
-       "      <td>0.003262</td>\n",
-       "      <td>-0.006554</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2000-01-07</th>\n",
-       "      <td>0.005604</td>\n",
-       "      <td>-0.000995</td>\n",
-       "      <td>-0.000164</td>\n",
-       "      <td>-0.004608</td>\n",
-       "      <td>-0.008584</td>\n",
-       "      <td>-0.000306</td>\n",
-       "      <td>0.004896</td>\n",
-       "      <td>-0.001971</td>\n",
-       "      <td>0.001772</td>\n",
-       "      <td>0.000841</td>\n",
-       "      <td>...</td>\n",
-       "      <td>0.005792</td>\n",
-       "      <td>0.001142</td>\n",
-       "      <td>0.004715</td>\n",
-       "      <td>0.000173</td>\n",
-       "      <td>0.003328</td>\n",
-       "      <td>0.001518</td>\n",
-       "      <td>0.009072</td>\n",
-       "      <td>-0.004446</td>\n",
-       "      <td>0.001961</td>\n",
-       "      <td>-0.004652</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2000-01-10</th>\n",
-       "      <td>0.001093</td>\n",
-       "      <td>0.001036</td>\n",
-       "      <td>0.001808</td>\n",
-       "      <td>0.000430</td>\n",
-       "      <td>-0.001655</td>\n",
-       "      <td>-0.001340</td>\n",
-       "      <td>-0.006231</td>\n",
-       "      <td>0.007149</td>\n",
-       "      <td>-0.005827</td>\n",
-       "      <td>-0.003586</td>\n",
-       "      <td>...</td>\n",
-       "      <td>-0.004741</td>\n",
-       "      <td>0.003890</td>\n",
-       "      <td>0.000424</td>\n",
-       "      <td>0.002544</td>\n",
-       "      <td>0.002860</td>\n",
-       "      <td>-0.002889</td>\n",
-       "      <td>0.001497</td>\n",
-       "      <td>-0.003636</td>\n",
-       "      <td>-0.000924</td>\n",
-       "      <td>0.003583</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>...</th>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2023-09-20</th>\n",
-       "      <td>0.000672</td>\n",
-       "      <td>0.003378</td>\n",
-       "      <td>0.003179</td>\n",
-       "      <td>-0.005761</td>\n",
-       "      <td>0.003475</td>\n",
-       "      <td>0.001039</td>\n",
-       "      <td>-0.000845</td>\n",
-       "      <td>-0.002282</td>\n",
-       "      <td>-0.003364</td>\n",
-       "      <td>-0.002279</td>\n",
-       "      <td>...</td>\n",
-       "      <td>-0.001770</td>\n",
-       "      <td>0.002249</td>\n",
-       "      <td>0.002883</td>\n",
-       "      <td>-0.003437</td>\n",
-       "      <td>-0.005506</td>\n",
-       "      <td>0.002603</td>\n",
-       "      <td>0.001204</td>\n",
-       "      <td>-0.003150</td>\n",
-       "      <td>0.003682</td>\n",
-       "      <td>0.000884</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2023-09-21</th>\n",
-       "      <td>-0.004014</td>\n",
-       "      <td>0.000238</td>\n",
-       "      <td>-0.002301</td>\n",
-       "      <td>0.000503</td>\n",
-       "      <td>-0.002554</td>\n",
-       "      <td>0.001577</td>\n",
-       "      <td>-0.000318</td>\n",
-       "      <td>0.007358</td>\n",
-       "      <td>0.000760</td>\n",
-       "      <td>-0.005215</td>\n",
-       "      <td>...</td>\n",
-       "      <td>-0.002196</td>\n",
-       "      <td>0.009500</td>\n",
-       "      <td>-0.003946</td>\n",
-       "      <td>-0.000513</td>\n",
-       "      <td>-0.002119</td>\n",
-       "      <td>-0.001317</td>\n",
-       "      <td>0.001233</td>\n",
-       "      <td>0.001115</td>\n",
-       "      <td>0.001266</td>\n",
-       "      <td>0.001024</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2023-09-22</th>\n",
-       "      <td>-0.001984</td>\n",
-       "      <td>0.003389</td>\n",
-       "      <td>-0.003966</td>\n",
-       "      <td>0.005549</td>\n",
-       "      <td>0.002383</td>\n",
-       "      <td>-0.005322</td>\n",
-       "      <td>0.000990</td>\n",
-       "      <td>-0.000638</td>\n",
-       "      <td>0.002561</td>\n",
-       "      <td>0.003347</td>\n",
-       "      <td>...</td>\n",
-       "      <td>-0.002277</td>\n",
-       "      <td>0.003851</td>\n",
-       "      <td>-0.000812</td>\n",
-       "      <td>-0.000530</td>\n",
-       "      <td>-0.005350</td>\n",
-       "      <td>-0.006388</td>\n",
-       "      <td>-0.004331</td>\n",
-       "      <td>0.000208</td>\n",
-       "      <td>0.003962</td>\n",
-       "      <td>-0.001164</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2023-09-25</th>\n",
-       "      <td>0.001255</td>\n",
-       "      <td>-0.000491</td>\n",
-       "      <td>0.000934</td>\n",
-       "      <td>-0.003486</td>\n",
-       "      <td>0.002823</td>\n",
-       "      <td>0.000936</td>\n",
-       "      <td>0.001178</td>\n",
-       "      <td>0.002676</td>\n",
-       "      <td>0.000966</td>\n",
-       "      <td>-0.000768</td>\n",
-       "      <td>...</td>\n",
-       "      <td>-0.002975</td>\n",
-       "      <td>-0.002404</td>\n",
-       "      <td>0.005076</td>\n",
-       "      <td>-0.001225</td>\n",
-       "      <td>-0.002615</td>\n",
-       "      <td>-0.001526</td>\n",
-       "      <td>0.006041</td>\n",
-       "      <td>0.001451</td>\n",
-       "      <td>0.001280</td>\n",
-       "      <td>0.001500</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2023-09-26</th>\n",
-       "      <td>-0.002724</td>\n",
-       "      <td>-0.003338</td>\n",
-       "      <td>0.001998</td>\n",
-       "      <td>0.001834</td>\n",
-       "      <td>0.000155</td>\n",
-       "      <td>0.000516</td>\n",
-       "      <td>-0.003293</td>\n",
-       "      <td>0.003096</td>\n",
-       "      <td>-0.004128</td>\n",
-       "      <td>-0.001218</td>\n",
-       "      <td>...</td>\n",
-       "      <td>0.004620</td>\n",
-       "      <td>-0.002510</td>\n",
-       "      <td>-0.003503</td>\n",
-       "      <td>0.008428</td>\n",
-       "      <td>-0.001012</td>\n",
-       "      <td>-0.000826</td>\n",
-       "      <td>-0.000012</td>\n",
-       "      <td>-0.000055</td>\n",
-       "      <td>0.000907</td>\n",
-       "      <td>0.003052</td>\n",
-       "    </tr>\n",
-       "  </tbody>\n",
-       "</table>\n",
-       "<p>6191 rows × 75 columns</p>\n",
-       "</div>"
-      ],
-      "text/plain": [
-       "                  T0        T1        T3        T4        T5        T6  \\\n",
-       "2000-01-04       NaN       NaN       NaN       NaN       NaN       NaN   \n",
-       "2000-01-05 -0.001454  0.000380  0.005909  0.003457 -0.005594 -0.005661   \n",
-       "2000-01-06 -0.005067 -0.001687  0.000715 -0.000934 -0.000332  0.001453   \n",
-       "2000-01-07  0.005604 -0.000995 -0.000164 -0.004608 -0.008584 -0.000306   \n",
-       "2000-01-10  0.001093  0.001036  0.001808  0.000430 -0.001655 -0.001340   \n",
-       "...              ...       ...       ...       ...       ...       ...   \n",
-       "2023-09-20  0.000672  0.003378  0.003179 -0.005761  0.003475  0.001039   \n",
-       "2023-09-21 -0.004014  0.000238 -0.002301  0.000503 -0.002554  0.001577   \n",
-       "2023-09-22 -0.001984  0.003389 -0.003966  0.005549  0.002383 -0.005322   \n",
-       "2023-09-25  0.001255 -0.000491  0.000934 -0.003486  0.002823  0.000936   \n",
-       "2023-09-26 -0.002724 -0.003338  0.001998  0.001834  0.000155  0.000516   \n",
-       "\n",
-       "                  T7        T8        T9       T10  ...       T89       T90  \\\n",
-       "2000-01-04       NaN       NaN       NaN       NaN  ...       NaN       NaN   \n",
-       "2000-01-05  0.006896  0.000760  0.001963  0.007932  ...  0.007658 -0.003752   \n",
-       "2000-01-06  0.002840 -0.000088 -0.000333 -0.001227  ... -0.004984 -0.002119   \n",
-       "2000-01-07  0.004896 -0.001971  0.001772  0.000841  ...  0.005792  0.001142   \n",
-       "2000-01-10 -0.006231  0.007149 -0.005827 -0.003586  ... -0.004741  0.003890   \n",
-       "...              ...       ...       ...       ...  ...       ...       ...   \n",
-       "2023-09-20 -0.000845 -0.002282 -0.003364 -0.002279  ... -0.001770  0.002249   \n",
-       "2023-09-21 -0.000318  0.007358  0.000760 -0.005215  ... -0.002196  0.009500   \n",
-       "2023-09-22  0.000990 -0.000638  0.002561  0.003347  ... -0.002277  0.003851   \n",
-       "2023-09-25  0.001178  0.002676  0.000966 -0.000768  ... -0.002975 -0.002404   \n",
-       "2023-09-26 -0.003293  0.003096 -0.004128 -0.001218  ...  0.004620 -0.002510   \n",
-       "\n",
-       "                 T92       T93       T94       T95       T96       T98  \\\n",
-       "2000-01-04       NaN       NaN       NaN       NaN       NaN       NaN   \n",
-       "2000-01-05 -0.001921 -0.001777 -0.000561  0.002421 -0.000910 -0.005058   \n",
-       "2000-01-06  0.002004 -0.001833  0.002670  0.001595 -0.005330  0.002026   \n",
-       "2000-01-07  0.004715  0.000173  0.003328  0.001518  0.009072 -0.004446   \n",
-       "2000-01-10  0.000424  0.002544  0.002860 -0.002889  0.001497 -0.003636   \n",
-       "...              ...       ...       ...       ...       ...       ...   \n",
-       "2023-09-20  0.002883 -0.003437 -0.005506  0.002603  0.001204 -0.003150   \n",
-       "2023-09-21 -0.003946 -0.000513 -0.002119 -0.001317  0.001233  0.001115   \n",
-       "2023-09-22 -0.000812 -0.000530 -0.005350 -0.006388 -0.004331  0.000208   \n",
-       "2023-09-25  0.005076 -0.001225 -0.002615 -0.001526  0.006041  0.001451   \n",
-       "2023-09-26 -0.003503  0.008428 -0.001012 -0.000826 -0.000012 -0.000055   \n",
-       "\n",
-       "                 T99      T100  \n",
-       "2000-01-04       NaN       NaN  \n",
-       "2000-01-05  0.005528  0.001457  \n",
-       "2000-01-06  0.003262 -0.006554  \n",
-       "2000-01-07  0.001961 -0.004652  \n",
-       "2000-01-10 -0.000924  0.003583  \n",
-       "...              ...       ...  \n",
-       "2023-09-20  0.003682  0.000884  \n",
-       "2023-09-21  0.001266  0.001024  \n",
-       "2023-09-22  0.003962 -0.001164  \n",
-       "2023-09-25  0.001280  0.001500  \n",
-       "2023-09-26  0.000907  0.003052  \n",
-       "\n",
-       "[6191 rows x 75 columns]"
-      ]
-     },
-     "execution_count": 7,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "returns"
-   ]
-  }
- ],
- "metadata": {
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