Stocks may have ended in the red on Tuesday, Feb. 27, but inflows into the SPDR S&P 500 (SPY)  exchange-trade fund fund were still big-time.

Investors added $2.11 billion to the SPDR S&P 500 ETF in Tuesday's trading session, increasing the fund's assets by 0.8% to $278.5 billion, according to data from Bloomberg. The fund has reached net inflows of $7.25 billion in the past year.

At the end of trading Tuesday, the fund's biggest holdings were, unsurprisingly, some of Wall Street's darlings.

Apple Inc. (AAPL) saw an increase of 1.09 million shares in the fund Tuesday, pushing its position to 60.4 million shares total worth about $10.8 billion. Apple stock represents 3.9% of the fund as a whole. Apple stock closed Tuesday down 0.32% to $178.39. Shares gained 0.83% in early trading Wednesday.

Microsoft Corp. (MSFT) comes in second as far as holdings with 3.1% of the fund. In Tuesday trading, investors added 1.63 million shares to reach 90.7 million in the fund, tallying a grand total worth $8.54 billion. Microsoft stock finished Tuesday lower 1.28% to $94.20. Shares gained 1.18% in early trading Wednesday.

Next came Amazon.com Inc. (AMZN) , which represents 2.6% of the fund's total asset value. On Tuesday, Amazon's share of the fund increased by 84,708 shares to 4.7 million. The Amazon holdings in the fund are worth $7.11 billion. Amazon stock fell 0.66% to $1,511.98 at the market close Tuesday. On Wednesday morning, shares were up 0.96%.

Facebook Inc. (FB) shares were 1.8% of the total asset value of the ETF. Investors added 504,266 to tally 28 million shares total in the fund, worth $5.09 billion. Facebook stock dipped 1.88% to $181.46 Tuesday. Shares gained 0.67% in morning action Wednesday.

JPMorgan Chase & Co. (JPM)  was 1.7% of the fund, with total value tallying $4.79 billion. In Tuesday trading, investors added 733,774 JPM shares to reach 40.8 million total. JPMorgan stock lost 1.19% Tuesday to close at $117.36. On Wednesday, JPM stock gained 0.85%.

The fund itself fell 1.27% Tuesday to $274.38. On Wednesday, shares of the fund gained 0.60% in morning trading.

Apple, Microsoft, Amazon, Facebook and JPMorgan are holdings in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio . Want to be alerted before Cramer buys or sells the stocks? Learn more now.

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