In the context of this series of interconnected finance-related queries and the additional information provided by the pretext, table data, and posttext from a company's financial filings, please provide a response to the final question. This may require extracting information from the context and performing mathematical calculations. Please take into account the information provided in the preceding questions and their answers when formulating your response:
Context: stock total return performance the following graph compares our total return to stockholders with the returns of the standard & poor 2019s composite 500 index ( 201cs&p 500 201d ) and the dow jones us select health care providers index ( 201cpeer group 201d ) for the five years ended december 31 , 2018 . the graph assumes an investment of $ 100 in each of our common stock , the s&p 500 , and the peer group on december 31 , 2013 , and that dividends were reinvested when paid. . <table class='wikitable'><tr><td>1</td><td></td><td>12/31/2013</td><td>12/31/2014</td><td>12/31/2015</td><td>12/31/2016</td><td>12/31/2017</td><td>12/31/2018</td></tr><tr><td>2</td><td>hum</td><td>$ 100</td><td>$ 140</td><td>$ 176</td><td>$ 202</td><td>$ 247</td><td>$ 287</td></tr><tr><td>3</td><td>s&p 500</td><td>$ 100</td><td>$ 114</td><td>$ 115</td><td>$ 129</td><td>$ 157</td><td>$ 150</td></tr><tr><td>4</td><td>peer group</td><td>$ 100</td><td>$ 128</td><td>$ 135</td><td>$ 137</td><td>$ 173</td><td>$ 191</td></tr></table> the stock price performance included in this graph is not necessarily indicative of future stock price performance. .
Conversations: 
q0: what was the highest change in the performance price for the first year? 40.0
Question: and what was the lowest?
Answer: