pan class="s1">&#39;identifier&#39;</span><span class="p">:</span> <span class="p">[</span><span class="s1">&#39;STOCK_A&#39;</span><span class="p">,</span> <span class="s1">&#39;STOCK_B&#39;</span><span class="p">],</span>
     <span class="s1">&#39;quantity&#39;</span><span class="p">:</span> <span class="p">[</span><span class="mi">100</span><span class="p">,</span> <span class="mi">100</span><span class="p">],</span>
     <span class="s1">&#39;cost_basis&#39;</span><span class="p">:</span> <span class="