RICE

• The total rice stocks inventory as of 01 February 2021 was 2,193.10 thousand metric tons. This exhibits a decrement of -7.7 percent from its level of 2,375.50 thousand metric tons in the same period of the previous year. Similarly, rice stocks inventory declined by -6.0 percent from 2,332.00 thousand metric tons compared with the previous month's level. (Figure 1 and Table 1)
• Rice stocks in the households went up by 13.0 percent compared with the previous year’s level, while rice stocks in commercial warehouses and NFA depositories contracted by -15.7 percent and -38.1 percent, respectively.
• Month-on-month, rice stocks in commercial warehouses increased by 2.8 percent. However, stocks in the households dropped by -8.4 percent and in NFA depositories, -14.2 percent
• About 53.9 percent of this month’s total rice stocks inventory were held in the households, 32.3 percent in commercial warehouses, and 13.8 percent in NFA depositories. (Table 1)

CORN

• The total corn stocks inventory as of 01 February 2021 was recorded at 774.83 thousand metric tons. This shows an increment of 18.4 percent from the previous year’s same period level of 654.53 thousand metric tons. On the otherhand, corn stocks decreased by -15.2 percent compared with the previous month’s level of 914.07 thousand metric tons. (Table 2 and Figure 2)
• This month’s corn stocks in all sectors were higher compared with their respective levels in the previous year. Stocks in the households and commercial warehouses increased by 46.5 percent and 9.8 percent, respectively.
• Compared with the previous month’s record, the existing stocks in the households and commercial warehouses had respective declines of -22.4 percent and -11.9 percent.
• Of the total corn stocks inventory, 28.9 percent were in the households and 71.1 percent were in commercial warehouses. (Table 2)

DENNIS S. MAPA, Ph.D.
Undersecretary
National Statistician and Civil Registrar General

Technical Notes

Monthly rice and corn stocks inventory are generated from three sectors, namely: household, commercial, and government (National Food Authority). The household stocks are taken from the results of Palay and Corn Stocks Survey (PCSS) of the Philippine Statistics Authority (PSA). Effective February 2021, PSA also generates the commercial stocks inventory from the results of Commercial Stocks Survey (CSS) per Implementing Rules and Regulations of R.A. No. 11203 known as “The Rice Tariffication Law”.  The government stocks inventory is taken from administrative records from the National Food Authority.

The PCSS covers sample farming households and non-farming households nationwide.  Sample farming households are sub-sample of Palay Production Survey (PPS) and Corn Production Survey (CPS). In these surveys, the primary sampling units (PSUs) are the palay/corn producing barangays and secondary sampling units (SSUs) are the palay/corn farming households. The PSUs are selected using probability proportional to size while the SSUs are selected through systematic sampling. For the non-farming households, five (5) non-farming households are selected for each barangay.

The CSS employs a two-stage systematic sampling wherein the first level of stratification is the line of activity of the NFA registered grains businessmen and the second level of stratification is the businessmen’s capitalization. The line of activity of grains businessmen are stratified into four: 1- retailers, 2-wholesalers, 3 - combined retailers-wholesalers and 4 - warehousemen.  The line of activity is further sub-stratified according to businessmen’ capitalization such as 1- big, 2 - medium and 3 - small capitalization structure, while warehousemen are sub-stratified into two, that is 1 - big and 2 - combined medium and small.