Stocks fell sharply on Tuesday, reversing gains from yesterday's session, as traders sold off shares amid rising fears of a global economic slowdown. The Dow Jones Industrial Average fell over 800 points, while the S&P 500 Index and Nasdaq Composite dropped nearly 3% and 4% respectively.

Wall Street also looked ahead to big tech earnings due this week. Alphabet (GOOG  ) and Microsoft (MSFT  ) are reporting their quarterly earnings after closing bell.

Here's how the market settled on Tuesday:

S&P 500 Index (SPY  ): -2.81% or -120.92 points to 4,175.20

Dow Jones Industrial Average (DIA  ): -2.38% or -808.95 points to 33,240.51

Nasdaq Composite Index (QQQ  ): -3.95% or -514.11 points to 12,490.74

Delta to start paying flight attendants during boarding:

Delta Air Lines (DAL  ) said it will start paying flight attendants during boarding, according to a company memo viewed by CNBC. This is a first for a major U.S. airline and comes as an union campaign by the Association of Flight Attendants gains support in the wake of the pandemic.

Delta plans to begin the boarding pay--half of flight attendants' hourly rates--on June 2, according to the memo. The airline is also increasing board time for narrow-body flights to 40 minutes from 35, which Delta says is "one of several steps we're taking to add resiliency to our operations," quoted by CNBC.

Delta's more than 20,000 flight attendants are not unionized, unlike other major U.S. airlines.

Home prices climb higher in February:

Standard & Poor's reported Tuesday that its S&P CoreLogic Case-Shiller national home price index posted a 19.8% gain during February, up from 19.1% in January. February's print marks the third-highest reading since the index was developed in the 1980s.

Beneath the headline, the 10-City Composite rose 18.6% year-over-year, up from 17.3% in January, while the 20-City Composite gained 20.2% annually, up from 18.9% in the previous month.

"The macroeconomic environment is evolving rapidly and may not support extraordinary home price growth fro much longer," said Craig J. Lazzara, managing director and global head of index investment strategy at S&P DJI, in a press statement. "The post-COVID resumption of general economic activity ahs stock inflation, and the Federal Reserve has begun to increase interest rates in response."

"We may soon begin to see the impact of increasing mortgage rates on home prices," he added.

Here's how benchmarks started trading after market open:

S&P 500 Index: -0.52% or -22.31 points to 4,273.81

Dow Jones Industrial Average: -0.66% or -224.66 points to 33,824.80

Nasdaq Composite Index: +1.29% or +165.56 points to 13,004.85