Sorry, I couldn't find pricing data for that day. The closing price for SPY on March 29, 2018 was $232.54. It was up 0.8% for the day. The latest price is $720.65.
| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME |
|---|---|---|---|---|---|
March 29 2018 | $230.74 | $234.40 | $229.61 | $232.54 | 111,601,600 |
Daily pricing data for SPY dates back to 1/29/1993, and may be incomplete.