The substantial investment of $900 million by Air Lease Corporation in aircraft during the first quarter is a strong indicator of the company's growth strategy and its bullish outlook on the aircraft leasing industry. This level of investment is likely to be viewed positively by investors, as it reflects the company's commitment to expanding its fleet and enhancing its competitive position in the market. Consequently, this news could lead to a positive short-term impact on AL's stock price, as it signals confidence in the company's future growth and profitability.