Jerry, I was able to download 1 year of SPY data from Yahoo to Excel. Here is part of it
Date Open High Low Close* Adj Close** Volume
16-Oct-18 276.6 280.82 276.07 280.24 280.24 105,448,278
15-Oct-18 275.55 277.04 274.3 274.4 274.4 102,073,100
12-Oct-18 276.77 277.09 272.37 275.95 275.95 183,186,500
11-Oct-18 277.08 278.9 270.36 272.17 272.17 274,840,500
10-Oct-18 286.83 286.91 277.88 278.3 278.3 214,731,000
9-Oct-18 287.39 288.86 286.77 287.4 287.4 74,339,000
8-Oct-18 287.05 288.22 285.5 287.82 287.82 87,742,200
5-Oct-18 289.69 290.27 286.22 287.82 287.82 105,951,700
4-Oct-18 291.18 291.24 287.66 289.44 289.44 111,545,900
3-Oct-18 292.74 293.21 291.32 291.72 291.72 64,694,600
2-Oct-18 291.56 292.36 291.14 291.56 291.56 47,258,200
1-Oct-18 292.11 292.93 290.98 291.73 291.73 62,078,900
28-Sep-18 289.99 291.28 289.95 290.72 290.72 70,091,400
27-Sep-18 290.41 291.91 290.1 290.69 290.69 59,249,500
26-Sep-18 290.91 292.24 289.41 289.88 289.88 79,739,700
25-Sep-18 291.53 291.65 290.48 290.75 290.75 44,370,000
24-Sep-18 291.34 291.5 290.37 291.02 291.02 53,409,600
21-Sep-18 293.09 293.22 291.81 291.99 291.99 105,479,700
21-Sep-18 1.323 Dividend