A 1-for-3 reverse stock split means that shareholders will receive one new share for every three shares currently owned. Reverse splits reduce the number of shares outstanding while proportionally increasing the market price per share, leaving the investor’s overall market value (ignoring market reactions and rounding) essentially unchanged at the moment of the split. In this question, the investor owns 300 shares at $9.00 each. Dividing the share count by 3 results in 100 shares after the reverse split (300 ÷ 3 = 100). Because the split is reverse, the price is multiplied by 3 to keep the position value constant: $9.00 × 3 = $27.00 per share. Therefore, the investor will have 100 shares at $27.00, which is answer choice A.

You can also verify by checking the total value before and after the split. Before: 300 × $9.00 = $2,700. After: 100 × $27.00 = $2,700. This illustrates the central split principle tested on the SIE: stock splits and reverse splits change share count and per-share price, but do not inherently create gains or losses; instead, they adjust the number of shares and the price per share proportionally. Cost basis per share is adjusted accordingly (the total cost basis remains the same, but it is allocated across fewer shares at a higher per-share basis).

Reverse splits are often used by issuers seeking to raise the trading price per share (for example, to meet listing requirements), and the SIE commonly tests the mechanical impact on share quantity, market price, and cost basis.