Sabr stock: June 1 - June 20, 2020

June 1 - June 20, 2020

Lowest 6.88           June 1, 2020
Highest 11.50        June 8, 2020

swing range: 11.50 - 6.88 = 4.7, percentage:  4.7/6.88 = 68%

My position:

June 6, 10.42,   300 shares,  -3126.90
June 18, 8.315,  200 shares, -1663.00

Loss: -724.90, -15.13%

Facts to review:
SABR
June 1 - June 20  18% up
June 1 - June 18  68% up

                    June 1     June 8    June 19
SPX             3055        3232       3097
SABR          6.88         11.50      8.1
SABR           0%          68%       18%

Actionable Items:

If I know SPX 500 index will go down in one day, more than 2%, then I will sell all position of SABR, and then purchase back when the price is low. I can quickly recover my loss